Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

time machine


Simple Definition of time machine

  • in stories : a machine that allows people to travel to a time in the past or future

Source: Merriam-Webster's Learner's Dictionary

Full Definition of time machine

  1. :  a hypothetical device that permits travel into the past and future


First Known Use of time machine


Seen and Heard

What made you want to look up time machine? Please tell us where you read or heard it (including the quote, if possible).