Breadcrumb Home > Dictionary > Index T theta: Meaning and Definition of Find definitions for: the•ta Pronunciation: (thā'tu, thē'-), [key] — n. the eighth letter of the Greek alphabet (&THgr;, &thgr;). the consonant sound represented by this letter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: theta (Thesaurus) Thessaly theta rhythm TrendingHere are the facts and trivia that people are buzzing about. Ramadan and Eid al-Fitr 42 Best War Movie Quotes Current Events This Week: March 2023 Recycling Facts William Shakespeare Worst U.S. Forest Fires ✖ Related Content Daily Word Quiz: recreant Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language