lifespan
The total duration of an individual's existence, from birth to death. While it often refers to biological organisms, it is frequently applied metaphorically to mechanical objects or abstract concepts.
In a biological context, it carries a neutral, scientific tone. It differs from 'life expectancy', which is a statistical prediction, whereas 'lifespan' describes the actual window of time available for living.
When used for technology (e.g., "the lifespan of a battery"), it suggests a finite period of utility before inevitable failure or obsolescence. The connotation here is one of gradual depletion.
Countable when comparing the durations of different species or objects ('The lifespan of a mayfly is much shorter than that of a human'). Uncountable when discussing the general concept of how long something lasts ('Scientists are studying ways to extend healthy lifespan').
💬Casual Conversation
I swear the lifespan of my focus is like, five minutes max these days.
I swear the lifespan of my focus is like, five minutes max these days.
Same. We really gotta buckle down though.
Same. We really gotta buckle down though.