Inhabitant of Scotland, part of Britain; or person of Scottish descent. Originally the Scots were a Celtic (Gaelic) people of N Ireland who migrated to Scotland in the 5th century. Although English is the main language, a distinct dialect called Lallans is spoken in the Scottish Lowlands. Scottish Gaelic is spoken by 1.3%, mainly in the Highlands. Norse elements are found in the dialect of Shetland.