/ Dictionary / Index P peen: Meaning and Definition of Find definitions for: peen Pronunciation: (pēn), [key] — n. a wedgelike, spherical, or other striking end of a hammer head opposite the face. —v.t. to enlarge, straighten, or smooth with a peen. to strengthen (a metal surface) by light hammering or by bombardment with steel balls or shot. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: peen (Thesaurus) peel-off Peene Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language