Trip  —v. (-pp-) 1 a (often foll. By up) (cause to) stumble, esp. By catching the feet. B (foll. By up) (cause to) make a slip or blunder. 2 a move with quick light steps. B (of a rhythm etc.) Run lightly. 3 make an excursion to a place. 4  a operate (a mechanism) suddenly by knocking aside a catch etc. B automatically cut out. 5 slang have a hallucinatory experience caused by a drug. —n. 1 journey or excursion, esp. For pleasure. 2 a stumble or blunder. B tripping or being tripped up. 3 nimble step. 4 slang drug-induced hallucinatory experience. 5 device for tripping a mechanism etc. [dutch trippen skip, hop]