Couture refers to:

1. The business of designing, making, and selling highly fashionable, usually custom-made Clothing for women.
2. Dressmakers and fashion designers considered a s a group.
3. The high-fashion clothing created by designers.

Couture means high-fashion designing and dressmaking. Origin: from French, sewing, dressmaking, from Old French cousture seam; from Latin consuere to stitch together, from suere to sew.
Other /More definition:
Couture refers to a very highly fashionable jewelry and clothing that has been created by leading fashion and jewelry designers. Also referred to as Haute Couture.
List of books: Couture