/ Dictionary / Index P parent-in-law: Meaning and Definition of Find definitions for: par•ent-in-law Pronunciation: (pâr'unt in-lô", par'-), [key] — pl. par•ents-in-law. the father or mother of one's wife or husband. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parenting Parent-Teacher Association 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