1. people who design, make, or sell costumes
2. people who wear costumes, especially for performances or events

Examples

• The theater hired experienced costumers for the Broadway production.
• Professional costumers worked for months creating elaborate period outfits.
• The Halloween store employed several costumers during peak season.
• Movie costumers must research historical accuracy for period films.
• The costumers at the Renaissance fair wore authentic medieval clothing.
• Local costumers gathered at the comic convention to show off their creations.