Noun

• S: (n) act (act%1:10:01::), enactment (enactment%1:10:00::) (a legal document codifying the result of deliberations of a committee or society or legislative body)
• S: (n) act (act%1:03:00::), deed (deed%1:03:00::), human action (human_action%1:03:00::), human activity (human_activity%1:03:00::) (something that people do or cause to happen)
• S: (n) act (act%1:10:00::) (a subdivision of a play or opera or ballet)
• S: (n) act (act%1:10:02::), routine (routine%1:10:01::), number (number%1:10:04::), turn (turn%1:10:00::), bit (bit%1:10:00::) (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"
• S: (n) act (act%1:10:03::) (a manifestation of insincerity) "he put on quite an act for her benefit"

Verb

• S: (v) act (act%2:41:00::), move (move%2:41:00::) (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"
• S: (v) act (act%2:29:00::), behave (behave%2:29:00::), do (do%2:29:09::) (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"
• S: (v) act (act%2:36:00::), play (play%2:36:02::), represent (represent%2:36:02::) (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"
• S: (v) act (act%2:33:00::) (discharge one's duties) "She acts as the chair"; "In what capacity are you acting?"
• S: (v) act (act%2:29:01::), play (play%2:29:01::), act as (act_as%2:29:00::) (pretend to have certain qualities or state of mind) "He acted the idiot"; "She plays deaf when the news are bad"
• S: (v) act (act%2:42:00::) (be suitable for theatrical performance) "This scene acts well"
• S: (v) work (work%2:41:03::), act (act%2:41:06::) (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"
• S: (v) act (act%2:41:07::) (be engaged in an activity, often for no particular purpose other than pleasure)
• S: (v) dissemble (dissemble%2:36:00::), pretend (pretend%2:36:00::), act (act%2:36:04::) (behave unnaturally or affectedly) "She's just acting"
• S: (v) act (act%2:36:03::), play (play%2:36:10::), roleplay (roleplay%2:36:00::), playact (playact%2:36:00::) (perform on a stage or theater) "She acts in this play"; "He acted in `Julius Caesar'"; "I played in `A Christmas Carol'"