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brain day. In DICTIOUS you will not only get to know all the dictionary meanings for the word
brain day, but we will also tell you about its etymology, its characteristics and you will know how to say
brain day in singular and plural. Everything you need to know about the word
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English
Noun
brain day (plural brain days)
- (informal) A day dedicated to research, study or intellectual pursuits.
Usage notes
- Used somewhat ironically in the context of physical fitness and to its exclusion.