Definitions of trip:

• noun:   an unintentional but embarrassing blunder

  Example: "He recited the whole poem without a single trip"

• noun:   a light or nimble tread

  Example: "He heard the trip of women's feet overhead"

• noun:   a journey for some purpose (usually including the return)

  Example: "He took a trip to the shopping center"

• noun:   an exciting or stimulting experience
• noun:   a hallucinatory experience induced by drugs

  Example: "An acid trip"

• noun:   a catch mechanism that acts as a switch

  Example: "The pressure activates the tripper and releases the water"

• noun:   an accidental misstep threatening (or causing) a fall
• verb:   get high, stoned, or drugged

  Example: "He trips every weekend"

• verb:   put in motion or move to act
• verb:   cause to stumble

  Example: "The questions on the test tripped him up"

• verb:   make a trip for pleasure
• verb:   miss a step and fall or nearly fall