The person hired to project a fashion mood. In film or television, this is a person who interprets trends well in advance and can predict what will be popular with the viewing audience. Additionally, the stylist on a "fashion shoot" will select the accessories and coordinate the clothing pieces to best reflect the message the designer is imparting in his/her collection.
See also Field, Patricia.
Historical Dictionary of the Fashion Industry. Francesca Sterlacci and Joanne Arbuckle.