once in a lifetime
idiom
: very rare or very rarely
a once-in-a-lifetime opportunity
This sort of opportunity comes along once in a lifetime.
Examples of once in a lifetime in a Sentence
Recent Examples on the Web
The ability to be a part of that, and, more importantly—with the right investment—bring that back into winning ways, that literally only happens, in my experience, once in a lifetime.
—
Viju Mathew, Robb Report, 19 Nov. 2025
This is probably a once in a lifetime event.
—Sara Schilling, Sacbee.com, 12 Nov. 2025
Sharing this special day with you is once in a lifetime!
—Michael Nied, PEOPLE, 25 Sep. 2025
The collapse of the Japanese empire ushered in an extraordinary—indeed, a once in a lifetime—opportunity for Koreans.
—Kornel Chang
september 19, Literary Hub, 19 Sep. 2025
See All Example Sentences for once in a lifetime
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Viju Mathew, Robb Report, 19 Nov. 2025
This is probably a once in a lifetime event.
—Sara Schilling, Sacbee.com, 12 Nov. 2025
Sharing this special day with you is once in a lifetime!
—Michael Nied, PEOPLE, 25 Sep. 2025
The collapse of the Japanese empire ushered in an extraordinary—indeed, a once in a lifetime—opportunity for Koreans.
—Kornel Chang
september 19, Literary Hub, 19 Sep. 2025
See All Example Sentences for once in a lifetime
Cite this Entry
“Once in a lifetime.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/once%20in%20a%20lifetime. Accessed 29 Nov. 2025.
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