lifespan
noun [ C ] uk/ˈlaɪf.spæn/ us/ˈlaɪf.spæn/
C2 寿命;可持续年限，有效期
the length of time for which a person, animal, or thing exists
The average human lifespan in the developed countries has increased over the last hundred years. 发达国家的人均寿命在过去的100年间延长了。
The project's lifespan is estimated at about five years. 预计这项工程为期5年左右。
Synonyms: life (TIME ALIVE)lifetime
See also: span noun (TIME)