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English definition of “act”

act

noun     /ækt/
DO [C] B2 something that someone does: an act of terrorism/kindnessActing and actsDealing with things or people
LAW [C] a law made by a government: an act of Congress/ParliamentLegislation and law-makingRules and laws
THEATRE [C] B1 one of the parts a play is divided into: Her character doesn't appear until Act 2.Parts of plays, shows and films
PERFORMERS [C] one or several performers who perform for a short while in a show: a comedy double act Actors and performersSpectacles and performances
FALSE BEHAVIOUR [no plural] behaviour that hides your real feelings or intentions: Was she really upset or was that just an act?Faking and pretending
in the act (of doing sth) doing something wrong: I caught him in the act of opening one of my letters.Acting and actsDealing with things or people
(Definition of act noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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