/ Dictionary / Index P pumper: Meaning and Definition of Find definitions for: pump•er Pronunciation: (pum'pur), [key] — n. a person or thing that pumps. a fire truck specially equipped to pump water at the site of a fire. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pump box pumpernickel Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language