An assembly or party of people wearing (usually elaborate or fanciful) masks and costumes, and amusing themselves with dancing, conversation, or other diversions.
User Defined Definitions
"a party of guests wearing costumes and masks"
"a costume worn as a disguise at a masquerade party"
"making a false outward show"
"take part in a masquerade"
"pretend to be someone or something that you are not"