April fool


noun

the victim of a practical joke or trick on April Fools' Day.
a practical joke or trick played on that day.

Origin of April fool

First recorded in 1680–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for april fool

April fool


noun

an unsuspecting victim of a practical joke or trick traditionally performed on the first of April (April Fools' Day or All Fools' Day)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012