I'd say via many dictionary descriptions of Kilt they often refer them as" short pleated skirts" worn by men or descriptions that include Scottish Highlands along with it .

They are skirts or is it that skirts are kilts ...Don't know what came first !!!!

Doesn't matter , whatever they are classified they are , they're awesome. To the nay sayers .. Some of us say "Don't knock it til you try it " Guarantee one thing that if they are brave enough to do it many will wonder why they hadn't before eh ..