Tundra definition

tŭndrə
A cold, treeless, usually lowland area of far northern regions. The lower strata of soil of tundras are permanently frozen, but in summer the top layer of soil thaws and can support low-growing mosses, lichens, grasses, and small shrubs.
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Tundra is the vast treeless plain in the Arctic region between the icecap and the tree line.

An example of tundra is where the subsoil is permanently frozen and the only growth is low growing plants such as moss and lichen.

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Any of the vast, nearly level, treeless plains of the arctic regions.
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A treeless area beyond the timberline in high-latitude regions, having a permanently frozen subsoil and supporting low-growing vegetation such as lichens, mosses, and shrubs.
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A similar area found at high elevations.
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Other Word Forms

Noun

Singular:
tundra
Plural:
tundras

Origin of tundra

  • Russian from Sami tūndar flat-topped hill

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Kildin Sami tÅ«Ì„ndra, the genitive form of тӯндар (tÅ«ndar, “treeless plain").

    From Wiktionary