/ Dictionary / Index S slack water: Meaning and Definition of Find definitions for: slack' wa'ter Pronunciation: [key] a period when a body of water is between tides. water that is free of currents. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. slack suit slag Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language