Someone who designs or supplies costumes (as for a play or masquerade)(noun)
WordNet. Princeton University. 2010.
Use "costume designer" in a sentence
"My production team negotiates most of the key department-head deals, including that of the director of photography, production designer, costume designer and editor."
"Sharon Pendana is a seasoned fashion professional bringing years of sartorial expertise to her work as a wardrobe stylist and costume designer USA Local 829 for print, film, and television."