Fancy dress is clothing that you wear for a party at which everyone tries to look like a famous person or a person from a story, from history, or from a particular profession. Guests were told to come in fancy dress. A masquerade costume. clothes that you wear, especially to parties, that make you look like a famous person, a character from a story etc
A fancy dress party (British English) or a costume party (American English) is a type of party, common mainly in contemporary Western culture, where guests dress up in costumes. Costumed Halloween parties are popular in the United States, Canada, Australia and New Zealand
A fancy dress party (British English) or a costume party (American English), mainly in contemporary Western culture, is a type of party where guests dress up in a costume