Definition

Noun: 1. The length of time for which a person, animal, or thing lives or functions: The period from birth or beginning to death or termination. 2. The duration of existence or usefulness of something.

Usage

• "Lifespan" is a countable noun.
• It is commonly used to discuss biology, product durability, technology, and abstract concepts.
• It is often modified by adjectives like , , , , , or .

Examples

• The lifespan of a mayfly is only 24 hours.
• Researchers are studying ways to extend the human lifespan.
• The average lifespan of this model of refrigerator is about 15 years.
• Political movements often have a short lifespan.

Advanced Usage

• "Within/in the lifespan of": During the lifetime or functional period of something/someone.
  • We have seen incredible technological change within the lifespan of my grandmother.
• "Lifespan approach/development" (Psychology): A methodological perspective that considers development across the entire course of life.
  • The study uses a lifespan approach to understand cognitive changes from infancy to old age.

Variants and Related Words

• Life (noun): The period between birth and death; the existence of an individual. (Note: "Life" is broader and can also mean the state of being alive, a biography, or vitality, while "lifespan" specifically refers to the measurable duration.)
• Longevity (noun): Long life or long duration. Often implies living a particularly long time.
• Duration (noun): The length of time that something continues. A more general term.
• Life expectancy (noun phrase): The statistically average number of years a person or organism is expected to live based on demographic factors.

Synonyms

• Lifetime
• Duration of life
• Life cycle (when referring to the series of stages)
• Existence

Antonyms

• (Conceptually) Death, end, termination.

Related Phrases/Idioms

• "Outlive its lifespan": To continue to exist or function beyond its expected or useful period.
  • That old policy has long outlived its lifespan and needs to be replaced.
• "Lifespan of a product": A common business and engineering term for how long a product is designed or expected to last.
  • Engineers are working to increase the lifespan of the product while reducing its cost.

Noun

1. the period during which something is functional (as between birth and death)
   • the battery had a short life
   • he lived a long and happy life