longevity.

A long life or a long period of continued existence or usefulness.

Use it for

Words that belong together

• exceptional longevity
• the longevity of a career

On the page

The technique's longevity owed more to its reliability than to tradition.

Usage notes

Primary category: academic / formal. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: analysis, explanation. Commonness: moderately common.