/ Dictionary / Index S sinkhole: Meaning and Definition of Find definitions for: sink•hole Pronunciation: (singk'hōl"), [key] — n. a hole formed in soluble rock by the action of water, serving to conduct surface water to an underground passage. Also calleda depressed area in which waste or drainage collects. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sinkhole (Thesaurus) sinker Sinkiang Uighur 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