Dictionary

life span

noun

: the amount of time that a person or animal actually lives

Full Definition of LIFE SPAN

1
:  the average length of life of a kind of organism or of a material object especially in a particular environment or under specified circumstances
2
:  the duration of existence of an individual

Examples of LIFE SPAN

  1. the average life span of house cats
  2. increase the human life span

First Known Use of LIFE SPAN

1898

life span

noun \ˈlīf-ˌspan\   (Medical Dictionary)

Medical Definition of LIFE SPAN

1
:  the duration of existence of an individual
2
:  the average length of life of a kind of organism or of a material object especially in a particular environment or under specified circumstances

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