Overnight or Over Night – What’s the Difference? Overnight can be an adjective or an adverb Either way, it refers to something that happens in the span of time between one day and the next day
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Overnight or Over Night – What’s the Difference? - Two Minute English When deciding between overnight and over night, remember that they have different uses Overnight is an adverb or adjective, often describing something that happens in one night or changes quickly For example, “She became famous overnight” or “We’re going on an overnight trip ”