knap·​weed | \ ˈnap-ˌwēd How to pronounce knapweed (audio) \

Definition of knapweed

: any of various weedy centaureas especially : a widely naturalized European perennial (Centaurea nigra) with tough wiry stems and knobby heads of purple flowers

Examples of knapweed in a Sentence

Recent Examples on the Web The Pull Your Share movement, started by Great Falls High teacher Dan Wilkins three years ago, encourages people to spend five to 15 minutes on their trips pulling out noxious, nonnative knapweed at campgrounds and other sites. USA TODAY, "Retired monkeys, freeze-dried blood, ‘Hidden Figures Way’: News from around our 50 states," 14 June 2019 Invasives mainly on roadsides: Cutleaf teasel, wild parsnip,spotted knapweed, phragmites, leafy spurge, Canada thistle and crown vetch. Joanne Kempinger Demski, Milwaukee Journal Sentinel, "Invasive plants to watch out for," 20 Aug. 2017

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

First Known Use of knapweed

15th century, in the meaning defined above

History and Etymology for knapweed

Middle English knopwed, from knop knop + wed weed

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The first known use of knapweed was in the 15th century

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Cite this Entry

“Knapweed.” Dictionary, Merriam-Webster, Accessed 13 May. 2021.

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