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to do something for a particular purpose or to solve a problem: [ + to infinitive ] Engineers acted quickly to repair the damaged pipes. act for Who is acting for the defendant? act on behalf of The agent was acting on behalf of (= representing) her client, a Broadway actress. She acted without thinking. Thesaurus: synonyms, antonyms, and examples.
1. a. : the doing of a thing : deed. an act of courage. b. law : something done voluntarily. 2. : the process of doing something : action. caught in the act. 3. : the formal product of a legislative body : statute. an act of Congress. also : a decision or determination of a sovereign, a legislative council, or a court of justice. 4.
Act definition: anything done, being done, or to be done; deed; performance. See examples of ACT used in a sentence.
25 meanings: 1. something done or performed; a deed 2. the performance of some physical or mental process; action 3. the.... Click for more definitions.
Definition of act verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
verb. behave in a certain manner; show a certain behavior; conduct or comport oneself. “You should act like an adult”. “The dog acts ferocious, but he is really afraid of people”. synonyms: behave, do. act as, play. pretend to have certain qualities or state of mind. dissemble, pretend.
Contents. ACT definition: 1. to behave in a particular way: 2. to do something, especially in order to solve a problem: 3…. Learn more.