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Definition of tundra noun from the Oxford Advanced American Dictionary

 

tundra

 noun
noun
NAmE//ˈtʌndrə//
 
[uncountable]
 
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the large, flat, Arctic regions of northern Europe, Asia, and N. America where no trees grow and where the soil below the surface of the ground is always frozen
See the Oxford Advanced Learner's Dictionary entry: tundra