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3. once in a lifetime

once in a lifetime

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once in a lifetime

only likely to happen once in someone's life Opportunities to play in the Cup Final only come once in a lifetime so we've got to make the most of it.

See also: lifetime, once

once in a lifetime

Extremely rare, especially as an opportunity. For example, An offer like that will come just once in a lifetime. This phrase, often used hyperbolically, was first recorded in 1854. Also see of one's life.

See also: lifetime, once