(grammar) A word (pronoun, pronominal adjective, or adverb) implying interrogation, or used for asking a question: why, who, when, etc. / (typography, archaic) Synonym of question mark ⟨?⟩.

Before attending the theater (especially of drinks or a meal). / Preceding the formation of theater.

present participle of soberise

plural of monadic second-order logic