/ Dictionary / Index T thought experiment: Meaning and Definition of Find definitions for: thought' exper"iment Pronunciation: [key] a demonstration or calculation that is based on the postulates of a theory, as relativity, and that demonstrates or clarifies the consequences of the postulates. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thought disorder thoughtful Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language