/ Dictionary / Index W wpn: Meaning and Definition of Find definitions for: wpn Pronunciation: [key] weapon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. wpm WPPSI Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language