/ Dictionary / Index P plunge pool: Meaning and Definition of Find definitions for: plunge' pool" Pronunciation: [key] the water in a plunge basin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plunge basin plunger 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