is an excellent Dictionary of Art Terms is a resource I have been using for several years.
I recommend that you give this resource a try by clicking here.
Most definitions are followed by illustrated examples of the term as well as external links to additional resources.
I highly recommend this online Art Dictionary for educating oneself further about any topic that is included in the arts.
Here is a definition for FASHION from

The prevailing style or custom. Most often refers to clothing (costume), but may refer to any cultural trend. Manner or mode. Also, to give shape or form to; to make. Fashion design refers specifically to designing clothing, and its associated accessories.

*And, of course, the above is only the introduction to information about fashion.
*Also, in the definition for FASHION each of the words that are in bold print are linked to their individual definitions!