The term "suiting", of course, refers to the cloth a suit is made from, just as jackets are made from jacking and shirts are made from shirting. This I've known for a long time. But over the past few years, I've seen the term used as a collective noun for suits. It seems as if half of the websites that sell suits have now changed their wording from "suits" to "suiting". Is this actually correct usage of the term? Is this a new thing of this decade, or has "suiting" always been a collective noun for suits? I can only recall seeing this recently. My printed dictionaries from the 1990s and earlier only have the definition that "suiting" is the material a suit is made from. Some online dictionaries only have that definition, though the collective noun can be found in many. I get the impression that people and brands now use the term "suiting" as a collective noun just to sound fancy. People who don't know anything about suits use the term because they think it makes them sound knowledgeable. Since it's now in dictionaries, it's legitimate. But is this usage only a recent development?