noun
lifespan; lifetime
Refers to the natural length of life for living things, or the period something is expected to last.
日本人の平均寿命は長い。
The average lifespan of Japanese people is long.
この犬の寿命は約15年です。
This dog's lifespan is about 15 years.
noun
service life; useful life
Used for the functional lifespan of objects, devices, or consumables like batteries and lightbulbs.
この電池の寿命はもうすぐ切れる。
This battery's life is about to run out.
電球の寿命が来たので交換した。
The lightbulb reached the end of its life, so I replaced it.