Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: lifetime  'lIf,tIm
  1. The period during which something is functional (as between birth and death)
    "the battery had a short lifetime";
    - life, life-time, lifespan
  2. A prolonged period of time
    "we've known each other for lifetimes";
    - long time, age, years, yonks [Brit, informal], donkey's years [Brit, informal]

Derived forms: lifetimes, life-times

Type of: period, period of time, time period, time span

Encyclopedia: Lifetime