Which term refers to long, enduring, timeless fashion?

The term that refers to long, enduring, timeless fashion is "Classic." Classics are styles that remain fashionable over time, transcending seasonal trends and fads. These pieces often embody simplicity and elegance, making them versatile and appealing across different eras. For example, a little black dress or a tailored blazer can be considered classic items because they have consistently remained in style, regardless of changing fashion trends.

Other terms like fashion trends or seasonal styles refer to garments that are popular for a limited time or specific season, indicating their transient nature. Modern styles may reflect current tastes but do not inherently imply longevity. Thus, the notion of timelessness is the defining characteristic of what makes an item a classic in the world of fashion.