ragweed

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noun rag·weed \ -ˌwēd \

Definition of ragweed

:any of various chiefly North American weedy composite herbs (genus Ambrosia) that produce highly allergenic pollen

Recent Examples of ragweed from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ragweed.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Illustration of ragweed

First Known Use of ragweed

1790


RAGWEED Defined for English Language Learners

ragweed

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noun

Definition of ragweed for English Language Learners

  • : any one of a group of North American plants that release a lot of pollen into the air and that can cause allergic reactions in some people


RAGWEED Defined for Kids

ragweed

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noun rag·weed \ ˈrag-ˌwēd \

Definition of ragweed for Students

:a common weed with pollen that irritates the eyes and noses of some people

Medical Dictionary

ragweed

play
noun rag·weed \ ˈrag-ˌwēd \

medical Definition of ragweed

:any of various chiefly North American weedy herbaceous plants comprising the genus Ambrosia and producing highly allergenic pollen responsible for much hay fever and asthma: as
a :an annual weed (A. artemisiifolia) with finely divided foliage that is common on open or cultivated ground in much of North America
b :a coarse annual (A. trifida) with some or all of the leaves usually deeply and palmately 3-cleft or 5-cleft called also great ragweed


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