/ Dictionary / Index P percent sign: Meaning and Definition of Find definitions for: percent' sign" Pronunciation: [key] a symbol (%) for “percent”: a 10% drop in population. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. percentile per centum Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language