The term "trip" has several meanings, depending on its context.
1) A trip can refer to a journey or excursion taken by someone, either for leisure or business purposes. For example, one might say "I'm going on a trip to Paris next month."
2) In the context of drugs and alcohol, a trip refers to an experience brought about by their consumption. This can be positive (e.g., feeling euphoric or having heightened senses), negative (e.g., experiencing hallucinations or anxiety), or neutral (e.g., simply feeling intoxicated).
3) In a more specific sense, "trip" can refer to a type of drug, typically LSD, which causes users to experience altered perceptions and feelings.
4) Finally, in some sports, particularly basketball, the term "trip" refers to an offensive foul committed by a player who intentionally contacts another player while that player is in possession of the ball.