Definition of "act"
act
/ækt/
noun
countable and uncountable, plural acts
(obsolete, uncountable) Actuality.
(countable, drama) A division of a theatrical performance.
(law) Ellipsis of act of parliament.
verb
third-person singular simple present acts, present participle acting, simple past and past participle acted
(intransitive) To perform a theatrical role.