once-in-a-lifetime

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English

Adjective

once-in-a-lifetime (not comparable)

  1. Likely to happen only once in one's lifetime; extremely rare.
    Synonym: of a lifetime
    a once-in-a-lifetime opportunity to travel the world
    • 2025 May 11, Nadeen Ebrahim and Abbas Al Lawati, “Trump is visiting three of the world’s richest nations. Here’s what’s on their wish list”, in CNN:
      With Trump in office, they see what one Gulf official called a “once-in-a-lifetime opportunity” to achieve his country’s objectives.

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