/ Dictionary / Index T Thera: Meaning and Definition of Find definitions for: The•ra Pronunciation: (thēr'u), [key] — n. a Greek island in the S Aegean, in the Cyclades group. 30 sq. mi. (78 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Theotokos theralite Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language