/ Dictionary / Index P plonk: Meaning and Definition of Find definitions for: plonk Pronunciation: (plongk), [key] — n. Chiefly Brit. inferior or cheap wine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plonk (Thesaurus) plomb plop Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language