Meaning of the word "once in a lifetime" in English

What does "once in a lifetime" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

once in a lifetime

US /wʌns ɪn ə ˈlaɪfˌtaɪm/
UK /wʌns ɪn ə ˈlaɪfˌtaɪm/
"once in a lifetime" picture

Idiom

1.

an event or opportunity that is very rare and unlikely to happen again in a person's life

Example:
Seeing the total solar eclipse was a once in a lifetime experience.
This opportunity to travel the world is truly a once in a lifetime chance.
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