lifetime
UK: ˈlaɪftaɪm | US: ˈlaɪftaɪm
n. the duration of a person's life or the existence of something
n. (attributive) lasting or valid for the whole of a person's life (e.g., lifetime achievement)
The word "lifetime" is a straightforward compound of "life" (Old English līf, meaning "existence") and "time" (Old English tīma, meaning "measured period"). It emerged in Middle English (14th century) to describe the span of one's existence. The morphemes retain their original meanings, combining logically to form a concept of temporal totality.
She dedicated her lifetime to scientific research.
The warranty covers the product for its lifetime.
He achieved a lifetime dream of climbing Mount Everest.
Lifetime friendships are rare and precious.
The artist's work gained recognition only after his lifetime.