act one's age

== English == === Pronunciation === === Verb === act one's age (third-person singular simple present acts one's age, present participle acting one's age, simple past and past participle acted one's age) (idiomatic) To behave in a manner appropriate to one's age. Synonym: behave one's age (imperative, originally US) To behave in a mature manner; to avoid being childish. ==== Derived terms ==== act one's age, not one's shoe size ==== Translations ====