/ Dictionary / Index B breastpin: Meaning and Definition of Find definitions for: breast•pin Pronunciation: (brest'pin"), [key] — n. a pin worn on the breast or at the throat; brooch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: breastpin (Thesaurus) breast line breastplate Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language