lifespan

noun

life·​span ˈlīf-ˌspan 

variants or less commonly 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

Word Icons

Synonyms

• continuance
• date
• duration
• life
• lifetime
• run
• standing
• time

Examples of lifespan in a Sentence

the average lifespan of house cats

increase the human lifespan

Word History

First Known Use

1831, in the meaning defined at sense 2

Kids Definition

life span

noun

: the average length of life of a living thing or of the persistence of a material object under specified circumstances or in a particular environment

Medical Definition

life span

noun

ˈlīf-ˌspan 

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