/ Dictionary / Index T Th.B.: Meaning and Definition of Find definitions for: Th.B. Pronunciation: [key] Bachelor of Theology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thb (Thesaurus) Thayer THC 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