/ Dictionary / Index S S.T.B.: Meaning and Definition of Find definitions for: S.T.B. Pronunciation: [key] Bachelor of Sacred Theology. Bachelor of Theology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. staysail stbd. Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language