Shortening of haute couture, thus ultimately from French couture.
couture (countable and uncountable, plural coutures)
- (fashion) The production of high-end, custom-made clothing
2007, Cally Blackman, 100 Years of Fashion Illustration, →ISBN, page 166:
It was the branding of these products, rather than the couture itself, that would become the foundation of the industry, generating huge global sales by the last quarter of the century.
From Old French cousture, from Vulgar Latin *cōnsutūra, from Latin cōnsūtus, from cōnsuō.
couture f (plural coutures)
- (medical) stitches