Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “act”

act

verb     /ækt/
BEHAVE [I] B1 to behave in a particular way: to act responsibly Jeff's been acting strangely recently . Stop acting like a child !Behaving, interacting and behaviour
DO SOMETHING [I] B2 to do something, especially in order to solve a problem : We have to act now to stop the spread of this disease .Acting and actsDealing with things or people
PERFORM [I, T] B1 to perform in a play or film : He's acted in a number of successful Hollywood films .Acting, rehearsing and performing
(Definition of act verb from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “act” in other dictionaries

Word of the Day

as husband and wife

in the same way as two people who are married

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More