a set of clothes people wear for a particular occasion
The woman wore a mask with her costume.
He chose a striking superhero costume for the costume party, complete with a cape and mask.
The theater production required a diverse range of costumes to represent various historical periods.
For Halloween, the children excitedly picked out their favorite costumes to wear for trick-or-treating.
The costume shop offered a wide selection of outfits, allowing customers to find the perfect attire for any themed event.