April fool ap·ril·fool uncommon noun 1. the butt of a prank played on April 1st SynonymsApril fool 2. a practical joke or trick played on April Fools'' day SynonymsApril fool Related words Word family April Fools'April Fools' day Broader terms practical jokebutt WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
