trip

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A going from one place to another; a journey.
• noun A stumble or fall.
• noun A maneuver causing someone to stumble or fall.
• noun A mistake.
• noun A hallucinatory experience induced by a psychedelic drug.
• noun An intense, stimulating, or exciting experience.
• noun A usually temporary but absorbing interest or preoccupation.
• noun A certain way of life or situation.
• noun A light or nimble tread.
• noun A device, such as a pawl, for triggering a mechanism.
• noun The action of such a device.
• intransitive verb To stumble.
• intransitive verb To move nimbly with light rapid steps; skip.
• intransitive verb To be released, as a tooth on an escapement wheel in a watch.
• intransitive verb To make a trip.
• intransitive verb To make a mistake.
• intransitive verb Slang To have a drug-induced hallucination.
• intransitive verb To cause to stumble or fall.
• intransitive verb To trap or catch in an error or inconsistency.
• intransitive verb To release (a catch, trigger, or switch), thereby setting something in operation.
• intransitive verb To raise (an anchor) from the bottom.
• intransitive verb To tip or turn (a yardarm) into a position for lowering.
• intransitive verb To lift (an upper mast) in order to remove the fid before lowering.
• idiom (trip the light fantastic) To dance.

from The Century Dictionary.

• To run or step lightly; skip, dance, or walk nimbly along; move with a quick, light tread.
• To make a brisk movement with the feet; prance.
• To take a voyage or journey; make a jaunt or excursion.
• To stumble; strike the foot against something so as to lose the step and come near falling; make a false step; lose the footing.
• Hence Figuratively, to make a false movement; err; go wrong; be guilty of an inconsistency or an inaccuracy.
• To rush by: said of deer.
• Synonyms Hop, Leap, etc. See skip.
• To perform with a light or tripping step, as a dance.
• To cause to stumble or fall, make a false step, or lose the footing by catching or entangling the feet or suddenly checking their free action: often followed by up.
• To cause to stumble by placing an obstruction in the way; hence, to give a wrong turn to, or cause to halt or stumble, by presenting a mental or moral stumbling-block.
• To catch in a fault, offense, or error; detect in a misstep or blunder.
• Nautical: To loose, as an anchor from the bottom by means of its cable or buoy-rope.
• To turn, as a yard, from a horizontal to a vertical position.
• Theat., to double in the center: said of a drop so situated that there is not room enough to hoist it out of sight.
• In mech.: To strike against, as a moving part against an obstruction.
• To release suddenly, as the clutch of the windlass of a pile-driver, or the valve-closing mechanism in the trip-gear of a steam-engine, etc.
• noun A light, short step; a lively movement of the feet.
• noun A journey or voyage; an excursion; a jaunt; specifically, in transportation, the performance of service one way over a route, the performance of service both ways being a round trip.
• noun A sudden seizure or catch, as that by which a wrestler throws his antagonist.
• noun A stumble by the loss of foothold or a striking of the foot against an object.
• noun In machinery, a hitting of a moving part against some obstruction to its free movement.
• noun A failure; an error; a blunder.