A rolling, marshy, mossy plain of Northern Siberia.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
\tun"dra\ (?), n. [russ.] one of the level or undulating treeless plains characteristic of northern arctic regions in both hemispheres. the tundras mark the limit of arborescent vegetation; they consist of black mucky soil with a permanently frozen subsoil, but support a dense growth of mosses and lichens, and dwarf herbs and shrubs, often showy-flowered.
\tun"dra\ (?), n. [russ., from a native name.] a rolling, marshy, mossy plain of northern siberia.
n : a vast treeless plain in the arctic regions between the ice cap and the tree line