Pronunciation: (trip'ur),[key] —n. 1. a person or thing that trips.
2. Mach. a. a tripping mechanism; a trip.
b. an apparatus causing a signal or other operating device to be tripped or actuated.
3. Brit. Informal.a person who goes on a pleasure trip or excursion; excursionist.
4. Slang.a person who is under the influence of a hallucinogenic drug, esp. LSD.