/ Dictionary / Index S sludging: Meaning and Definition of Find definitions for: sludg•ing Pronunciation: (sluj'ing), [key] — n. Pathol. intravascular slowing or clumping of red blood cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sludgeworm sludgy 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