Breadcrumb Home > Dictionary > Index P propensity: Meaning and Definition of Find definitions for: pro•pen•si•ty Pronunciation: (pru-pen'si-tē), [key] — pl. -ties. a natural inclination or tendency: a propensity to drink too much. favorable disposition or partiality. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: propensity (Thesaurus) propension propenyl ✖ Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language