/ Dictionary / Index K kerplunk: Meaning and Definition of Find definitions for: ker•plunk Pronunciation: (kur-plungk'), [key] — adv. with or as if with a sudden muffled thud: The huge stone hit the water kerplunk. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Kerouac Kerr Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language