SLAY Meaning of SLAY in English 1. v.tr. (past slew; past part. slain) 1. literary or joc. kill. 2 sl. overwhelm with delight; convulse with laughter. Derivatives: slayer n. Etymology: OE slean f. Gmc 2.var. of SLEY. Oxford English vocab. Оксфордский английский словарь. 2012