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all–nighter

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noun all–night·er \ˈȯl-ˈnī-tər\

Simple Definition of all–nighter

  • : a night during which someone works on something instead of sleeping

Source: Merriam-Webster's Learner's Dictionary

Full Definition of all–nighter

  1. :  something that lasts all night; specifically :  an all-night study session



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