discharge one's duties; "She acts as the chair"; "In what capacity are you acting?"
a subdivision of a play or opera or ballet
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"
a manifestation of insincerity; "he put on quite an act for her benefit"
perform on a stage or theater; "She acts in this play"; "He acted in `Julius Caesar'"; "I played in `A Christmas Carol'"
behave unnaturally or affectedly; "She's just acting"
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"
be engaged in an activity, often for no particular purpose other than pleasure
have an effect or outcome; often the one desired or expected; "The