act Meaning, definition in Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "act" - English Dictionary

See all translations

actverb

uk   us   /ækt/

act verb (BEHAVE)

[I] to behave in the stated way: Don't be so silly - you're acting like a child! He acted as if he'd never met me before.
More examples

act verb (DO SOMETHING)

B2 [I] to do something for a particular purpose or to solve a problem: [+ to infinitive] Engineers acted quickly to repair the damaged pipes. She acted without thinking. Who is acting for/on behalf of (= who is representing) the defendant? He never acts on other people's advice (= does what other people suggest). Acting on impulse (= without thinking first) can get you into a lot of trouble.
More examples

act verb (HAVE AN EFFECT)

[I] to have an effect: The anaesthetic acted quickly.

act verb (PERFORM)

B1 [I or T] to perform a part in a film, play, etc.: Ellis Pike was chosen to act the part of the lawyer in the film. Have you ever acted in a play before?act the fool, martyr, etc. to behave in a particular, usually bad, way: Why are you always acting the fool?
More examples

actnoun

uk   us   /ækt/

act noun (THING DONE)

B2 [C] something that you do: an act of aggression/bravery/madness/terrorism a kind/thoughtless/selfish act The simple act of telling someone about a problem can help. Primitive people regarded storms as an act of God. artistic representations of the sexual act
More examples

act noun (PERFORMANCE)

C2 [S] behaviour that hides your real feelings or intentions: Was she really upset or was that just an act? [C] a person or group that performs a short piece in a show, or the piece that they perform: a comedy/juggling/trapeze act Our next act is a very talented young musician.B1 [C] a part of a play or opera: Shakespeare's plays were written in five acts. The hero does not enter until the second act/Act Two.
More examples

act noun (LAW)

[C] specialized law a law or formal decision made by a parliament or other group of people who make the laws for their country: an Act of Parliament the Betting and Gaming Act Almost two hundred suspects were detained in the UK last year under the Prevention of Terrorism Act. The state legislature passed an act banning the sale of automatic weapons.
(Definition of act from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of act?
Add Cambridge dictionaries to your browser to your website

Definitions of “act” in other dictionaries

Word of the Day
avatar

an image that represents you in online games, chat rooms, etc. and that you can move around the screen

Word of the Day

The cake was made by my sister: how to use the passive in English.
The cake was made by my sister: how to use the passive in English.
by Liz Walter,
June 24, 2015
Look at these two sentences: My sister made the cake. The cake was made by my sister. Both these sentences mean the same. The first is an active sentence: it tells you what the sister did. The second is a passive sentence: it tells you what happened to the cake. Here are

Read More 

burger noun
burger noun
June 29, 2015
a menu on a computer screen comprising three short parallel horizontal lines which the user clicks to see options Definitely use a burger. You could put the settings in the burger menu too. Fix the settings to the bottom of the burger menu and use a vertically scrolling contact list that scrolls behind

Read More