Synonym: behave, do, law, perform, pretend. Similar words: fact, pact, exact, actor, react, tract, enact, act for. Meaning: [ækt] 
n. 1. a legal document codifying the result of deliberations of a committee or society or legislative body 2. something that people do or cause to happen 3. a subdivision of a play or opera or ballet 4. a short theatrical performance that is part of a longer program 5. a manifestation of insincerity. v. 1. perform an action, or work out or perform (an action) 2. behave in a certain manner; show a certain behavior; conduct or comport oneself 3. play a role or part 4. discharge one's duties 5. pretend to have certain qualities or state of mind 6. be suitable for theatrical performance 7. have an effect or outcome; often the one desired or expected 8. be engaged in an activity, often for no particular purpose other than pleasure 9. behave unnaturally or affectedly 10. perform on a stage or theater.
n. 1. a legal document codifying the result of deliberations of a committee or society or legislative body 2. something that people do or cause to happen 3. a subdivision of a play or opera or ballet 4. a short theatrical performance that is part of a longer program 5. a manifestation of insincerity. v. 1. perform an action, or work out or perform (an action) 2. behave in a certain manner; show a certain behavior; conduct or comport oneself 3. play a role or part 4. discharge one's duties 5. pretend to have certain qualities or state of mind 6. be suitable for theatrical performance 7. have an effect or outcome; often the one desired or expected 8. be engaged in an activity, often for no particular purpose other than pleasure 9. behave unnaturally or affectedly 10. perform on a stage or theater. 
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31) The act was adopted by an overwhelming majority.
32) We sometimes act on instinct.
33) They act as joint trustees of the fund.
34) You shouldn't act like a child.
35) heaven never helps the man who will not act.
36) You should act your age.
37) It was an absolutely senseless act of violence.
38) The Act was introduced to end restrictive practices in the docks.
39) To accomplish great things, in addition to dream, must act.
40) Though John and Andrew look exactly alike, they act quite differently.
41) This play is divided into three acts, and each act has three scenes.
42) The small fines for this type of crime do not act as much of a deterrent .
43) The time for thinking is past, we must now act.
44) You should act towards others as you would wish them to act towards you.
45) The UN must perform a difficult balancing act between the two sides in the conflict.
46) These problems have been greatly alleviated by the passing of the new Act.
47) The difference between successful persons and others is that they really act.
48) The main characters are offstage for most of the second act.
49) To accomplish great things, we must not only act, but also dream. Not only plan, but also believe.
50) The act lays down a minimum standard for air quality.
51) Look for something that can act as a shield, like a dustbin lid.
52) Dustbags act as a filter and suction will be reduced if they are too full.
53) The President was unable to act because the Democrats were boxing him in.
54) A storm - tossed ship was painted on the backdrop for the first act of the modern drama named Pirate.
55) He invested his lawyer with complete power to act for him.
56) The new tax laws should act as a stimulus to exports.
57) It is an act of moral cowardice for a society to neglect its poor.
58) All of life is an act of letting go,[www.Sentencedict.com]but what hurts the most is not taking a moment to say goodbye.
59) The centre will act as a clearing house for research projects for former nuclear scientists.
60) It is an act of kindness/a kind act to help a blind man across the street.