/ Dictionary / Index S subtract: Meaning and Definition of Find definitions for: sub•tract Pronunciation: (sub-trakt'), [key] — v.t. to withdraw or take away, as a part from a whole. to take (one number or quantity) from another; deduct. —v.i. to take away something or a part, as from a whole. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: subtract (Thesaurus) subtotal subtraction Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language