- 1
The quality of being long-lasting, especially of life.countableuncountable
- Grandpa had incredible longevity: he lived to be 105 years old!
- 2
Duration over time; persistence.countableuncountable
- A ‘postdating’ is an example of the use of a lexical item at a later date than currently recorded and these are important in establishing the longevity of use of a term and whether or not it has become obsolete.
syn. long-livedness · permanence