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English Lexicon

Lifespan

/ˈlaɪf.spæn/
nounCEFR B2 (Upper)Top #4500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The length of time for which a person or animal lives or a thing functions or lasts.

    "Advances in modern medicine have significantly increased the average human lifespan."
  2. 2

    The duration of existence or the period during which something is operational or effective.

    "Regular maintenance can greatly extend the lifespan of your vehicle."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the combination of the Old English words 'līf' (life, existence) and 'spann' (a span, distance from thumb to tip of little finger, later general duration). The compound emerged in the late 19th century to denote the length of time for which a person, animal, or thing lives or functions.

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