Revisiting the definition of "TMA"
A lot of confusion arises when people use the term traditional martial arts to describe a style. This is largely because many of the arts that are not considered to be TMA are, in fact, very traditional. Arts like wrestling, boxing and MT are steeped in tradition but are rarely included in the mental list of arts that is evoked by the mention of "TMA". So "traditional" is not really the defining factor of what people mean when they use "TMA".
It's tempting to make sport application the defining factor, with TMA being "non sport" and arts like wrestling and boxing being sport. However, you run into a lot of problmes there too. Certainly, according to that definition TKD and kyokushin would not be considered TMA. Unfortunately that definition causes confusion because TKD and Kyokushin often are included on the list of arts people consider to be TMA.
And therein lies the rub. We need a definition of TMA that conforms to the common usage of the term. That way we can understand what we mean by the term AND therefor limit the confusion that arises from use of the term (which isn't going away anytime soon). So, here's what I came up with.
Personally, I find that what most people REALLY mean when they refer to TMA are arts that have anachronistic training methods as a large part of their training methodology. Forms/kata; "ancient" training equipment (e.g. makiwara); a lack of modern safety gear; anachronistic workout clothing; outdated drills (e.g. one steps) etc. are things that you will find in "TMA". Not every TMA will have all these things, but they will have some of them and will have them as a large part of their training.
Using that definition, you tend to get arts to fall along the lines that most people usually mean when they use the term "TMA". Kyokushin, Tai Chi, Wing Chun, and Aikido are all TMA by that definition while boxing and wrestling are not. You still get some arts that are in a bit of a gray area, like Judo and TKD (TKD has a lot of modern influence in equipment, for example) but I think they still fall in the TMA camp (as most people think of them) according to my definition.
So, I proffer the term "Anachronistic Martial Arts" as being what most people really mean when they say "Traditional Martial Arts."