A Tartan: a specific pattern of colors woven together in a single fabric. These patterns are associated with thousands of families, regions, and organizations.
A Kilt: an article of clothing traditionally worn by Celtic men. It is a single piece of pleated cloth (5 yards, 8 yards or more), wrapped and buckled around a man’s waist. A sporran is often worn in front for carrying things, and a kilt pin keeps the kilt from flying in the wind and revealing the fact that nothing else was worn with a kilt (traditionally). Today, many men wear the kilt for ceremonial events, for wedding parties, for a nod to their heritage, or for just plain utilitarian reasons.
Highland Wear: Elements of the full ensemble that is worn by Irish & Scottish men for formal events: a kilt, a “Prince Charlie” tailed coat and vest, a sporran, a sgian dubh, flashes, hose, ghillie brogues (dress shoes), a collared shirt and tie, a kilt belt and belt buckle, and a kilt pin.