grandfather paradox

Definition from Wiktionary, the free dictionary
Jump to: navigation, search



grandfather paradox (countable and uncountable, plural grandfather paradoxes)

  1. (uncountable) The paradox of time travel that hypothetically occurs when one person goes back to the past and kills their biological grandfather before the latter fathered the traveller's father, thus, by extension, preventing the traveller to ever be conceived in the first place.
  2. (countable) An instance of the grandfather paradox.