/ Dictionary / Index P pep pill: Meaning and Definition of Find definitions for: pep' pill" Pronunciation: [key] a pill, tablet, or capsule that contains a stimulant drug, esp. amphetamine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. peppery peppy Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language