Entry 2 senses · 2 variants Webster, 1913 Aghast /əg-ăst'/ · A·ghast · IPA /əˈɡæst/ v. t. a. & p. p. 01 v. t. See Agast, v. t. 1. See Agast, v. t.[Obs.] See: Agast 02 a. & p. p. Terrified; struck with amazement; showing signs of terror or horror. 1. Terrified; struck with amazement; showing signs of terror or horror. “Aghast he waked; and, starting from his bed, Cold sweat in clammy drops his limbs o'erspread.” — Dryden. “The commissioners read and stood aghast.” — Macaulay.