Once-in-a-lifetime

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Likely to happen only once in one's lifetime; extremely rare. not-comparable

    "a once-in-a-lifetime opportunity to travel the world"

Synonyms

All synonyms
of a lifetime

Example

More examples

"A home is a once-in-a-lifetime purchase so you don't want to make any snap decisions."

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.