1(chiefly in names or geographical terms) of or relating to Scotland or the Scottish Highlands:the Caledonian Railway
2 Geology relating to or denoting a mountain-forming (orogenic) period in northwestern Europe and Greenland during the Early Paleozoic era, especially the late Silurian.
noun
1 humorous or literary a person from Scotland.
2 (the Caledonian) Geology the Caledonian orogeny.
Origin:
from Caledonia, the Latin name for northern Britain, + -an
