/ Dictionary / Index L longevity: Meaning and Definition of Find definitions for: lon•gev•i•ty Pronunciation: (lon-jev'i-tē, lôn-), [key] — n. a long individual life; great duration of individual life: Our family is known for its longevity. the length or duration of life: research in human longevity. length of service, tenure, etc.; seniority: promotions based on longevity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: longevity (Thesaurus) long ess longevous Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language