act

noun

1
something that people do or cause to happen
2
a legal document codifying the result of deliberations of a committee or society or legislative body
3
a short theatrical performance that is part of a longer program
he did his act three times every evening
she had a catchy little routine
4
a subdivision of a play or opera or ballet
5
a manifestation of insincerity
he put on quite an act for her benefit

1
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
2
pretend to have certain qualities or state of mind
He acted the idiot
She plays deaf when the news are bad
3
discharge one's duties
She acts as the chair
In what capacity are you acting?
4
play a role or part
Gielgud played Hamlet
She wants to act Lady Macbeth, but she is too young for the role
5
perform on a stage or theater
She acts in this play
He acted in `Julius Caesar'
6
behave unnaturally or affectedly
She's just acting
7
perform an action, or work out or perform (an action)
think before you act
We must move quickly

Also useful for “act”:Unscrambler— Turn loose letters into real words