/ Dictionary / Index S sack coat: Meaning and Definition of Find definitions for: sack' coat" Pronunciation: [key] a short coat or jacket with a straight back and no seam at the waist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sackcloth sack dress Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language