Added 9 October 2026 life-time noun Categories: TimeObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about life-time at Wordnik → Where our words come from → The period during which something is functional (as between birth and death). the battery had a short life Related Words: lifetimelifelonglife-styleshelflifelifecyclelife-loremid-lifer Back to today's word