/ Dictionary / Index T Thyestes: Meaning and Definition of Find definitions for: Thy•es•tes Pronunciation: (thī-es'tēz), [key] — n. Class. Myth. the brother of Atreus who unknowingly ate the flesh of his own sons when served to him by Atreus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Thyatira thylacine Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language