act, deed, human action, human activity

(noun) something that people do or cause to happen

act, enactment

(noun) a legal document codifying the result of deliberations of a committee or society or legislative body

act, routine, number, turn, bit

(noun) a short performance that is part of a longer program; “he did his act three times every evening”; “she had a catchy little routine”; “it was one of the best numbers he ever did”


(noun) a subdivision of a play or opera or ballet


(noun) a manifestation of insincerity; “he put on quite an act for her benefit”

act, behave, do

(verb) behave in a certain manner; show a certain behavior; conduct or comport oneself; “You should act like an adult”; “Don’t behave like a fool”; “What makes her do this way?”; “The dog acts ferocious, but he is really afraid of people”

act, play, act as

(verb) pretend to have certain qualities or state of mind; “He acted the idiot”; “She plays deaf when the news are bad”


(verb) discharge one’s duties; “She acts as the chair”; “In what capacity are you acting?”

act, play, represent

(verb) play a role or part; “Gielgud played Hamlet”; “She wants to act Lady Macbeth, but she is too young for the role”; “She played the servant to her husband’s master”

act, play, roleplay, playact

(verb) perform on a stage or theater; “She acts in this play”; “He acted in ‘Julius Caesar’”; “I played in ‘A Christmas Carol’”

dissemble, pretend, act

(verb) behave unnaturally or affectedly; “She’s just acting”

act, move

(verb) perform an action, or work out or perform (an action); “think before you act”; “We must move quickly”; “The governor should act on the new energy bill”; “The nanny acted quickly by grabbing the toddler and covering him with a wet towel”


(verb) be engaged in an activity, often for no particular purpose other than pleasure

work, act

(verb) have an effect or outcome; often the one desired or expected; “The voting process doesn’t work as well as people thought”; “How does your idea work in practice?”; “This method doesn’t work”; “The breaks of my new car act quickly”; “The medicine works only if you take it with a lot of water”


(verb) be suitable for theatrical performance; “This scene acts well”

Source: WordNet® 3.1

Proper noun


Initialism of Australian Capital Territory, a federal territory of Australia.

Coordinate terms: NSW, NT, QLD, SA, TAS, VIC, WA

Initialism of American College Test.


ACT (plural ACTs)

An instance of a certain standardized college admissions test in the United States, originally called the American College Test.

Coordinate terms

• (American College Test): SAT, GMAT, MCAT, DAT, PCAT


• ATC, CAT, CTA, Cat, TAC, TCA, cat, tac



act (countable and uncountable, plural acts)

(countable) Something done, a deed.

(obsolete, uncountable) Actuality.

(theology) Something done once and for all, as distinguished from a work.

(countable) A product of a legislative body, a statute.

The process of doing something.

(countable) A formal or official record of something done.

(countable, drama) A division of a theatrical performance.

(countable) A performer or performers in a show.

(countable) Any organized activity.

(countable) A display of behaviour.

A thesis maintained in public, in some English universities, by a candidate for a degree, or to show the proficiency of a student.

(countable) A display of behaviour meant to deceive.


• (something done): deed; see also action

• (product of a legislative body): statute

• (display of behavior): pretense


• (drama): scene


• (drama): play


act (third-person singular simple present acts, present participle acting, simple past and past participle acted)

(intransitive) To do something.

(obsolete, transitive) To do (something); to perform.

(intransitive) To perform a theatrical role.

(intransitive) Of a play: to be acted out (well or badly).

(intransitive) To behave in a certain manner for an indefinite length of time.

(copulative) To convey an appearance of being.

(intransitive) To do something that causes a change binding on the doer.

(intransitive, construed with on or upon) To have an effect (on).

(transitive) To play (a role).

(transitive) To feign.

(mathematics, intransitive, construed with on or upon, of a group) To map via a homomorphism to a group of automorphisms (of).

(obsolete, transitive) To move to action; to actuate; to animate.


• ATC, CAT, CTA, Cat, TAC, TCA, cat, tac

Source: Wiktionary

Act, n. Etym: [L. actus, fr. agere to drive, do: cf. F. acte. See Agent.]

1. That which is done or doing; the exercise of power, or the effect, of which power exerted is the cause; a performance; a deed. That best portion of a good man's life, His little, nameless, unremembered acts Of kindness and of love. Wordsworth. Hence, in specific uses: (a) The result of public deliberation; the decision or determination of a legislative body, council, court of justice, etc.; a decree, edit, law, judgment, resolve, award; as, an act of Parliament, or of Congress. (b) A formal solemn writing, expressing that something has been done. Abbott. (c) A performance of part of a play; one of the principal divisions of a play or dramatic work in which a certain definite part of the action is completed. (d) A thesis maintained in public, in some English universities, by a candidate for a degree, or to show the proficiency of a student.

2. A state of reality or real existence as opposed to a possibility or possible existence. [Obs.] The seeds of plants are not at first in act, but in possibility, what they afterward grow to be. Hooker.

3. Process of doing; action. In act, in the very doing; on the point of (doing). "In act to shoot." Dryden. This woman was taken . . . in the very act. John viii. 4. Act of attainder. (Law) See Attainder.

– Act of bankruptcy (Law), an act of a debtor which renders him liable to be adjudged a bankrupt.

– Act of faith. (Ch. Hist.) See Auto-da-Fé.

– Act of God (Law), an inevitable accident; such extraordinary interruption of the usual course of events as is not to be looked for in advance, and against which ordinary prudence could not guard.

– Act of grace, an expression often used to designate an act declaring pardon or amnesty to numerous offenders, as at the beginning of a new reign.

– Act of indemnity, a statute passed for the protection of those who have committed some illegal act subjecting them to penalties. Abbott.

– Act in pais, a thing done out of court (anciently, in the country), and not a matter of record.


– See Action.

Act, v. t. [imp. & p. p. Acted; p. pr. & vb. n. Acting.] Etym: [L. actus, p. p. of agere to drive, lead, do; but influenced by E. act, n.]

1. To move to action; to actuate; to animate. [Obs.] Self-love, the spring of motion, acts the soul. Pope.

2. To perform; to execute; to do. [Archaic] That we act our temporal affairs with a desire no greater than our necessity. Jer. Taylor. Industry doth beget by producing good habits, and facility of acting things expedient for us to do. Barrow. Uplifted hands that at convenient times Could act extortion and the worst of crimes. Cowper.

3. To perform, as an actor; to represent dramatically on the stage.

4. To assume the office or character of; to play; to personate; as, to act the hero.

5. To feign or counterfeit; to simulate. With acted fear the villain thus pursued. Dryden. To act a part, to sustain the part of one of the characters in a play; hence, to simulate; to dissemble.

– To act the part of, to take the character of; to fulfill the duties of.

Act, v. i.

1. To exert power; to produce an effect; as, the stomach acts upon food.

2. To perform actions; to fulfill functions; to put forth energy; to move, as opposed to remaining at rest; to carry into effect a determination of the will. He hangs between, in doubt to act or rest. Pope.

3. To behave or conduct, as in morals, private duties, or public offices; to bear or deport one's self; as, we know not why he has acted so.

4. To perform on the stage; to represent a character. To show the world how Garrick did not act. Cowper. To act as or for, to do the work of; to serve as.

– To act on, to regulate one's conduct according to.

– To act up to, to equal in action; to fulfill in practice; as, he has acted up to his engagement or his advantages.

Source: Webster’s Unabridged Dictionary 1913 Edition


Word of the Day

29 February 2024


(adverb) in an ingenious manner; “a Hampshire farmer had fowls of different breeds, including Dorkings, and he discriminated ingeniously between the ‘dark ones’ and the ‘white ones’”

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