Definition of all-nighter
: something that lasts all night;
specifically
: an all-night study session
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First Known Use of all-nighter
1870
ALL-NIGHTER Defined for English Language Learners
Definition of all-nighter for English Language Learners
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: a night during which someone works on something instead of sleeping
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See words that rhyme with all-nighter Spanish Central: Translation of all-nighter
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