Entry 3 senses · 2 variants Webster, 1913 Oust /oust/ · IPA /aʊst/ n. v. t. 01 n. See Oast. 1. See Oast. See: Oast 02 v. t. To take away; to remove. imp. & p. p. Ousted; p. pr. & vb. n. Ousting 1. To take away; to remove. “Multiplication of actions upon the case were rare, formerly, and thereby wager of law ousted.” — Sir M. Hale. 2. To eject; to expel; to turn out. “From mine own earldom foully ousted me.” — Tennyson.