once in a lifetime

idiom

Definition of once in a lifetime

: very rare or very rarely a once-in-a-lifetime opportunity This sort of opportunity comes along once in a lifetime.

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once in a blue moon

once in a lifetime

once more

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Cite this Entry

“Once in a lifetime.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/once%20in%20a%20lifetime. Accessed 10 Aug. 2022.

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