- The definition of a costumier, often spelled costumer, is a person who designs costumes for a play or performance.
Someone who picks out what actors in a play will wear is an example of a costumier.
costumier definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
costumer (sense )
costumier definition by American Heritage Dictionary
One that makes or supplies costumes; a costumer.
Origin: French, from costume, costume; see costume.