/ Dictionary / Index A armor-piercing: Meaning and Definition of Find definitions for: ar•mor-pierc•ing Pronunciation: (är'mur pēr"sing), [key] — adj. (of bullets, artillery shells, etc.) designed especially for piercing armor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. armorize armor plate Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language