Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun barnaby's_thistle
1 sense of barnaby's thistle
Sense 1
Barnaby's thistle, yellow star-thistle, Centaurea solstitialis -- (European weed having a winged stem and hairy leaves; adventive in the eastern United States)
=> weed -- (any plant that crowds out cultivated plants)