/ Dictionary / Index T Thermopylae: Meaning and Definition of Find definitions for: Ther•mop•y•lae Pronunciation: (thur-mop'u-lē"), [key] — n. a pass in E Greece, between the cliffs of Mt. Oeta and the Gulf of Lamia: Persian defeat of the Spartans 480 b.c. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thermopylae (Thesaurus) thermoplastic thermoreceptor Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language