/ Dictionary / Index S subdominant: Meaning and Definition of Find definitions for: sub•dom•i•nant Pronunciation: (sub-dom'u-nunt), [key] — n. the fourth tone of a diatonic scale, next below the dominant. —adj. less than or not quite dominant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: subdominant (Thesaurus) subdivision subdual Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language