/ Dictionary / Index T theo-: Meaning and Definition of Find definitions for: theo- Pronunciation: [key] a combining form meaning “god,” used in the formation of compound words: theocrat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thenceforth Theobald Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language