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Definition of tumbleweed noun from the Oxford Advanced American Dictionary

 

tumbleweed

 noun
noun
NAmE//ˈtʌmblˌwid//
 
[uncountable]
 
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a plant that grows like a bush in the desert areas of N. America and Australia. In the fall, it breaks off just above the ground and is blown around like a ball by the wind.
See the Oxford Advanced Learner's Dictionary entry: tumbleweed