Chiefly North American. A prominent, usually rounded hill, mountain, or peak; a knoll. Sometimes more generally: any hill.

Applied locally to a meadow by a river (as the Inches of Perth); also, to a piece of rising ground in the midst of a plain.

Esp. in the western United States: an isolated hill with steep sides, which rises abruptly from a surrounding plain.

a hill or mountain rising out of a plain.

= island-hill n.

An isolated hill or mountain which rises abruptly from its surroundings, typically a plain in a hot, dry region.