hoax UK /həʊks/US /hoʊks/noun 1verb 1forms 3 noun1 •Anything deliberately intended to deceive or trick.The phone call to the police about a tiger in a tree turned out to be a hoax.The news story about the pop singer coming to town, unfortunately for his fans, turned out to be a hoax. verb1 •To deceive (someone) by making them believe something that has been maliciously or mischievously fabricated. formshoaxed · hoaxing · hoaxes