/ Dictionary / Index M mentoplasty: Meaning and Definition of Find definitions for: men•to•plas•ty Pronunciation: (men'tu-plas"tē), [key] — pl. -ties. plastic surgery to correct a functional or cosmetic deformity of the chin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mentonnière mentor Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language