Activity Definition

Define what is Activity?

1. activity (noun)

any specific behavior.

  • they avoided all recreational activity.
Antonyms: inactivity (noun)

being inactive; being less active.


human action, human activity, act, deed noun
something that people do or cause to happen.


variation, variance noun
an activity that varies from a norm or standard.

space walk noun
any kind of physical activity outside a spacecraft by one of the crew.

domesticity noun
domestic activities or life.

operation noun
the activity of operating something (a machine or business etc.).

operation noun
a planned activity involving many people performing various actions.

practice, pattern noun
a customary way of operation or behavior.

diversion, recreation noun
an activity that diverts or amuses or stimulates.

cup of tea, dish, bag noun
an activity that you like or at which you are superior.

follow-up, followup noun
an activity that continues something that has already begun or that repeats something that has already been done.

game noun
a contest with rules to determine a winner.

turn, play noun
(game) the activity of doing something in an agreed succession.

music noun
musical activity (singing or whistling etc.).

acting, performing, playacting, playing noun
the performance of a part or role in a drama.

liveliness, animation noun
general activity and motion.

burst, fit noun
a sudden flurry of activity (often for no obvious reason).

work noun
activity directed toward making or doing something.

deeds, works noun
performance of moral or religious acts.

Service noun
(law) the acts performed by an English feudal tenant for the benefit of his lord which formed the consideration for the property granted to him.

Job, line of work, occupation, business, line noun
the principal activity in your life that you do to earn money.

occupation noun
any activity that occupies a person's attention.

committal to writing, writing noun
the activity of putting something in written form.

role noun
normal or customary activity of a person in a particular social setting.

actus reus, wrongful conduct, misconduct, wrongdoing noun
activity that transgresses moral or civil law.

waste, wastefulness, dissipation noun
useless or profitless activity; using or expending or consuming thoughtlessly or carelessly.

attempt, effort, try, endeavor, endeavour noun
earnest and conscientious activity intended to do or accomplish something.

control noun
the activity of managing or exerting control over something.

protection noun
the activity of protecting someone or something.

sensory activity noun
activity intended to achieve a particular sensory result.

didactics, Education, educational activity, instruction, pedagogy, teaching noun
the activities of educating or instructing; activities that impart knowledge or skill.

grooming, training, preparation noun
activity leading to skilled behavior.

representation noun
an activity that stands as an equivalent of something or results in an equivalent.

Creation, creative activity noun
the human act of creating.

disassembly, dismantlement, dismantling noun
the act of taking something apart (as a piece of machinery).

puncture noun
the act of puncturing or perforating.

search, hunting, Hunt noun
the activity of looking thoroughly in order to find something or someone.

usage, use, utilisation, utilization, exercise, employment noun
the act of using.

military operation, operation noun
activity by a military or naval force (as a maneuver or campaign).

measurement, measuring, mensuration, measure noun
the act or process of assigning numbers to phenomena according to a rule.

calibration, standardisation, standardization noun
the act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument.

organisation, organization noun
the activity or result of distributing or disposing persons or things properly or methodically.

grouping noun
the activity of putting things together in groups.

supporting, support noun
the act of bearing the weight of or strengthening.

continuance, continuation noun
the act of continuing an activity without interruption.

procedure, process noun
a particular course of action intended to achieve a result.

ceremony noun
any activity that is performed in an especially solemn elaborate or formal way.

ceremony noun
the proper or conventional behavior on some solemn occasion.

worship noun
the activity of worshipping.

activating, energizing, activation noun
the activity of causing to have energy and be active.

concealing, hiding, concealment noun
the activity of keeping something secret.

locating, positioning, emplacement, location, placement, position noun
the act of putting something in a certain place.

supplying, provision, supply noun
the activity of supplying or providing something.

demand noun
the act of demanding.

pleasure noun
an activity that affords enjoyment.

delectation, enjoyment noun
act of receiving pleasure from something.

lamentation, mourning noun
the passionate and demonstrative activity of expressing grief.

laughter noun
the activity of laughing; the manifestation of joy or mirth or scorn.

market, marketplace, market place noun
the world of commercial activity where goods and services are bought and sold.

politics noun
the activities and affairs involved in managing a state or a government.

preparation, readying noun
the activity of putting or setting in order in advance of some act or purpose.

assist, assistance, help, aid noun
the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose.

support noun
the activity of providing for or maintaining by supplying with money or necessities.

behavior, conduct, doings, behaviour noun
manner of acting or controlling yourself.

behaviour, behavior noun
(psychology) the aggregate of the responses or reactions or movements made by an organism in any situation.

leadership, leading noun
the activity of leading.

precession, precedence, precedency noun
the act of preceding in time or order or rank (as in a ceremony).

solo noun
any activity that is performed alone without assistance.

buzz noun
a confusion of activity and gossip.

fun noun
violent and excited activity.

Hell, Sin noun
violent and excited activity.

outlet, vent, release noun
activity that frees or expresses creative energy or emotion.

last noun
a person's dying act; the final thing a person can do.

obfuscation, mystification noun
the activity of obscuring people's understanding, leaving them baffled or bewildered.

negotiation noun
the activity or business of negotiating an agreement; coming to terms.

verbalisation, verbalization noun
the activity of expressing something in words.

disturbance, perturbation noun
activity that is a malfunction, intrusion, or interruption.

timekeeping noun
the act or process of determining the time.

2. activeness, action, activity (noun)

the state of being active.

  • his sphere of activity.
  • he is out of action.
Synonyms: activeness, action
Antonyms: inaction, inactiveness, inactivity (noun)

the state of being inactive.


State noun
the way something is with respect to its main attributes.


agency noun
the state of being in action or exerting power.

busyness, HUM noun
the state of being or appearing to be actively engaged in an activity.

behaviour, behavior noun
the action or reaction of something (as a machine or substance) under specified circumstances.

eructation, extravasation, eruption noun
(of volcanos) pouring out fumes or lava (or a deposit so formed).

operation noun
the state of being in effect or being operative.

overdrive noun
the state of high or excessive activity or productivity or concentration.

play noun
a state in which action is feasible.

swing noun
a state of steady vigorous action that is characteristic of an activity.

3. bodily function, bodily process, body process, activity (noun)

an organic process that takes place in the body.

  • respiratory activity.

biological process, organic process noun
a process occurring in living organisms.


control noun
(physiology) regulation or maintenance of a function or action or reflex etc.

breathing, external respiration, respiration, ventilation noun
the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation.

respiration noun
a single complete act of breathing in and out.

breath noun
the process of taking in and expelling air during breathing.

consumption, ingestion, intake, uptake noun
the process of taking food into the body through the mouth (as by eating).

sex, sex activity, sexual activity, sexual practice noun
activities associated with sexual intercourse.

insemination noun
the introduction of semen into the genital tract of a female.

sleeping noun
the suspension of consciousness and decrease in metabolic rate.

response, reaction noun
a bodily process occurring due to the effect of some antecedent stimulus or agent.

crying, tears, weeping noun
the process of shedding tears (usually accompanied by sobs or other inarticulate sounds).

ablactation noun
the cessation of lactation.

anastalsis noun
muscular action of the alimentary tract in a direction opposite to peristalsis.

expelling, discharge, emission noun
any of several bodily processes by which substances go out of the body.

expectoration noun
the process of coughing up and spitting out.

festering, suppuration, maturation noun
(medicine) the formation of morbific matter in an abscess or a vesicle and the discharge of pus.

healing noun
the natural process by which the body repairs itself.

hypostasis noun
the accumulation of blood in an organ.

lachrymation, lacrimation, tearing, watering noun
shedding tears.

lactation noun
the production and secretion of milk by the mammary glands.

opsonisation, opsonization noun
process whereby opsonins make an invading microorganism more susceptible to phagocytosis.

overactivity noun
excessive activity.

peristalsis, vermiculation noun
the process of wavelike muscle contractions of the alimentary tract that moves food along.

diaphoresis, hidrosis, sudation, sweating, perspiration noun
the process of the sweat glands of the skin secreting a salty fluid.

phagocytosis noun
process in which phagocytes engulf and digest microorganisms and cellular debris; an important defense against infection.

pinocytosis noun
process by which certain cells can engulf and incorporate droplets of fluid.

placentation noun
the formation of the placenta in the uterus.

psilosis noun
falling out of hair.

tanning noun
process in which skin pigmentation darkens as a result of exposure to ultraviolet light.

transpiration noun
the process of giving off or exhaling water vapor through the skin or mucous membranes.

4. activity (noun)

(chemistry) the capacity of a substance to take part in a chemical reaction.

  • catalytic activity.

capability, capacity noun
the susceptibility of something to a particular treatment.

5. natural action, natural process, action, activity (noun)

a process existing in or produced by nature (rather than by the intent of human beings).

  • the action of natural forces.
  • volcanic activity.

physical process, process noun
a sustained phenomenon or one marked by gradual changes through a series of states.


radiation noun
the spread of a group of organisms into new habitats.

absorption noun
(physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium.

acidification noun
the process of becoming acid or being converted into an acid.

adiabatic process noun
(thermodynamics) any process that occurs without gain or loss of heat.

aeration noun
the process of exposing to air (so as to purify).

antiredeposition noun
the process of preventing redeposition.

capture noun
any process in which an atomic or nuclear system acquires an additional particle.

capture noun
a process whereby a star or planet holds an object in its gravitational field.

centrifugation noun
the process of separating substances of different densities by the use of a centrifuge.

chemical action, chemical change, chemical process noun
(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved.

chromatography noun
a process used for separating mixtures by virtue of differences in absorbency.

concretion noun
the formation of stonelike objects within a body organ (e.g., the kidneys).

condensation noun
the process of changing from a gaseous to a liquid or solid state.

convection noun
(meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere.

clotting, coagulation, curdling noun
the process of forming semisolid lumps in a liquid.

decay noun
the process of gradually becoming inferior.

demagnetisation, demagnetization noun
the process of removing magnetization.

desorption noun
changing from an adsorbed state on a surface to a gaseous or liquid state.

diffusion noun
(physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration.

dissolution, disintegration noun
separation into component parts.

distillation, distillment noun
the process of purifying a liquid by boiling it and condensing its vapors.

drift noun
the gradual departure from an intended course due to external influences (as a ship or plane).

effervescence noun
the process of bubbling as gas escapes.

cataphoresis, dielectrolysis, electrophoresis, ionophoresis noun
the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode.

ecesis, establishment noun
(ecology) the process by which a plant or animal becomes established in a new habitat.

extinction noun
the reduction of the intensity of radiation as a consequence of absorption and radiation.

extraction noun
the process of obtaining something from a mixture or compound by chemical or physical or mechanical means.

feedback noun
the process in which part of the output of a system is returned to its input in order to regulate its further output.

filtration noun
the process whereby fluids pass through a filter or a filtering medium.

flocculation noun
the process of flocculating; forming woolly cloudlike aggregations.

flow noun
any uninterrupted stream or discharge.

formation noun
natural process that causes something to form.

fossilisation, fossilization noun
the process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone.

geologic process, geological process noun
(geology) a natural process whereby geological features are modified.

curing, solidification, solidifying, hardening, Set noun
the process of becoming hard or solid by cooling or drying or crystallization.

inactivation noun
the process of rendering inactive.

ion exchange noun
a process in which ions are exchanged between a solution and an insoluble (usually resinous) solid; widely used in industrial processing.

ionisation, ionization noun
the process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas.

leach, leaching noun
the process of leaching.

magnetic induction, magnetisation, magnetization noun
the process that makes a substance magnetic (temporarily or permanently).

materialisation, materialization noun
the process of coming into being; becoming reality.

nuclear reaction noun
(physics) a process that alters the energy or structure or composition of atomic nuclei.

opacification noun
the process of becoming cloudy or opaque.

oscillation noun
the process of oscillating between states.

oxygenation noun
the process of providing or combining or treating with oxygen.

pair creation, pair formation, pair production noun
the transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus.

phase change, phase transition, physical change, state change noun
a change from one state (solid or liquid or gas) to another without a change in chemical composition.

precession of the equinoxes noun
a slow westward shift of the equinoxes along the plane of the ecliptic caused by precession of the Earth's axis of rotation.

release noun
a process that liberates or discharges something.

saltation noun
(geology) the leaping movement of sand or soil particles as they are transported in a fluid medium over an uneven surface.

scattering noun
the physical process in which particles are deflected haphazardly as a result of collisions.

sericulture noun
raising silkworms in order to obtain raw silk.

sink noun
(technology) a process that acts to absorb or remove energy or a substance from a system.

soak, soakage, soaking noun
the process of becoming softened and saturated as a consequence of being immersed in water (or other liquid).

softening noun
the process of becoming softer.

sorption noun
the process in which one substance takes up or holds another (by either absorption or adsorption).

source noun
(technology) a process by which energy or a substance enters a system.

rigidification, rigidifying, stiffening noun
the process of becoming stiff or rigid.

stimulation noun
(physiology) the effect of a stimulus (on nerves or organs etc.).

ecological succession, succession noun
(ecology) the gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established.

natural selection, survival of the fittest, survival, selection noun
a natural process resulting in the evolution of organisms best adapted to the environment.

synergism, synergy noun
the working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects.

temperature change noun
a process whereby the degree of hotness of a body (or medium) changes.

transduction noun
the process whereby a transducer accepts energy in one form and gives back related energy in a different form.

transpiration noun
the passage of gases through fine tubes because of differences in pressure or temperature.

vitrification noun
the process of becoming vitreous.

6. activeness, activity (noun)

the trait of being active; moving or acting rapidly and energetically.

  • the level of activity declines with age.
Synonyms: activeness
Antonyms: inertia, inactiveness, inactivity (noun)

a disposition to remain inactive or inert.


trait noun
a distinguishing feature of your personal nature.


brio, invigoration, spiritedness, vivification, animation noun
quality of being active or spirited or alive and vigorous.

pizzaz, pizzazz, oomph, zing, dynamism noun
the activeness of an energetic personality.

Nearby Terms

actomyosin (noun)
a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions

actor (noun)
a theatrical performer

actor's agent (noun)
a business agent for an actor

actor's assistant (noun)
a wardrobe assistant for an actor

actor's line (noun)
words making up the dialogue of a play

actress (noun)
a female actor

Acts (noun)
a New Testament book describing the development of the early church from Christ's Ascension to Paul's sojourn at Rome

Acts of the Apostles (noun)
a New Testament book describing the development of the early church from Christ's Ascension to Paul's sojourn at Rome

actual (adjective)
presently existing in fact and not merely potential or possible

actual damages (noun)
(law) compensation for losses that can readily be proven to have occurred and for which the injured party has the right to be compensated

actual eviction (noun)
the physical ouster of a tenant from the leased premises; the tenant is relieved of any further duty to pay rent

actual possession (noun)
(law) immediate and direct physical control over property

actual sin (noun)
a sin committed of your own free will (as contrasted with original sin)

actualisation (noun)
making real or giving the appearance of reality

actualise (verb)
make real or concrete; give reality or substance to