Pronunciation: (lon-jev'i-tē, lôn-), [key]
1. a long individual life; great duration of individual life: Our family is known for its longevity.
2. the length or duration of life: research in human longevity.
3. length of service, tenure, etc.; seniority: promotions based on longevity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.