Definition of ragweed in English:

ragweed

Line breaks: rag|weed
Pronunciation: /ˈraɡwiːd
 
/

noun

[mass noun]
A North American plant of the daisy family. Its tiny green flowers produce copious amounts of pollen, making it a major causative agent of hay fever in some areas.
  • Ambrosia artemisia, family Compositae
More example sentences
  • Many early emerging summer annuals, including giant ragweed, kochia, crabgrass, lambsquarters, and Russian thistle, are removed during tillage, allowing the crop and any new weeds to emerge together.
  • It is wind-born pollen from plants that have inconspicuous flowers like wild grasses or ragweed that are the major causes of respiratory allergy.
  • Occasionally, broadleaf weeds, such as Canada thistle or ragweed, become established in winter wheat fields and interfere with grain harvest or with the following soybean crop.

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Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope