Dictionary.com

grandfather paradox

[ grand-fah-ther par-uh-doks, gran- ]
/ ˈgrændˌfɑ ðər ˌpær ə dɒks, ˈgræn- /
Save This Word!

noun
(in science fiction) a paradox created by time travel in which a person travels back in time and changes something in their own past or the past of their own timeline, after which the resulting timeline is altered such that the future point from which the time travel began does not exist or is unrecognizable.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of grandfather paradox

First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use grandfather paradox in a sentence

FEEDBACK