masquerade

1. An assembly or party of people wearing (usually elaborate or fanciful) masks and costumes, and amusing themselves with dancing, conversation, or other diversions. · Near-synonym: costume party· I was invited to the masquerade at their home.
2. The act of wearing a mask or dressing up in a costume for, or as if for, a masquerade ball.
3. An act of living under false pretenses; a concealment of something by a false or unreal show; a disguise, a pretence; also, a pretentious display. (figuratively)
4. An assembly of varied, often fanciful, things. (figuratively)
5. A cosplay event at which costumed attendees perform skits. (slang)

الجمع masquerades