This is one of several authoritative Thames & Hudson dictionaries, including Photography, Art Terms, and Graphic Design & Designers. It's also part of their long-running World of Art series.
The three-volume Encyclopedia Of Clothing & Fashion (edited by Valerie Steele) is a more comprehensive reference, and The Fashion Book has larger illustrations, though the Dictionary was the first A-Z guide to fashion designers. It covers the same period as The History Of Modern Fashion (by Daniel James Cole and Nancy Deihl), from the mid-nineteenth century (the sewing machine and the House of Worth) onwards.