"tumbleweeds" in the noun sense
any plant that breaks away from its roots in autumn and is driven by the wind as a light rolling mass
2. Russian thistle, Russian tumbleweed, Russian cactus, tumbleweed, Salsola kali tenuifolia
prickly bushy Eurasian plant a troublesome weed in central and western United States
3. winged pigweed, tumbleweed, Cycloloma atriplicifolium
bushy annual weed of central North America having greenish flowers and winged seeds
4. tumbleweed, Amaranthus albus, Amaranthus graecizans
bushy plant of western United States
Source: WordNet® (An amazing lexical database of English)
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