Definition of life span in English:

life span

Syllabification: life span
(also lifespan)

noun

  • The length of time for which a person or animal lives or a thing functions: the human life span
    More example sentences
    • As humans lengthened lifespans with better nutrition and hunting skills, childhood also lengthened.
    • They are slow-breeding and long-lived animals, achieving lifespans of 70 years or so.
    • I suggested that extending human lifespans might lead to extended creativity.

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Word of the day astrogation
Pronunciation: ˌastrəˈgāSHən
noun
(in science fiction) navigation in outer space