Breadcrumb Home > Dictionary > Index P presenility: Meaning and Definition of Find definitions for: pre•se•nil•i•ty Pronunciation: (prē"si-nil'i-tē), [key] — n. premature old age. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. presenile present ✖ Related Content Daily Word Quiz: umbrage Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language