a knee-length pleated tartan skirt worn by men as part of the traditional dress in the Highlands of northern Scotland

Of, relating to, or characteristic of a highland, used of high or hilly country, Relating to highlands, noun_ An area of land that is at elevation; mountainous land, Elevated or mountainous land; (often in the pl) an elevated region or country, An abrupt elevation of land; a high promontory or plateau_ as, a jutting highland