April Fools' Day

noun
variants: or less commonly April Fool's Day

Definition of April Fools' Day

: April 1 characteristically marked by the playing of practical jokes

First Known Use of April Fools' Day

1748, in the meaning defined above

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More Definitions for April Fools' Day

April Fools' Day

noun

English Language Learners Definition of April Fools' Day

: April 1 celebrated as a day on which people play tricks on each other

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