noun
lifetime
LYF-tym
noun
1
The entire duration of someone's or something's life.
"She saw huge technological change in her lifetime."
"The bridge was designed to last a lifetime."
How to Use Lifetime
Learner’s notesIn plain EnglishThe whole span of time someone or something is alive or in existence.
Common pairings
lifetime achievement
once in a lifetime
lifetime guarantee
Word Forms
lifetimes plural
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She saw huge technological change in her _____.
Etymology
From Middle English lyftyme, formed from life + time.