: any of several herbs (genus Polygonum) of the buckwheat family with leaves and bracts jointed and having a very short petiole
broadly
: polygonum
Examples of knotweed in a Sentence
Recent Examples on the Web
No offense to your prize camellia, but the garden is the least of your worries with Japanese knotweed.
—
Melissa Locker, Southern Living, 7 Sep. 2023
Weed killers can also help in the process of removing Japanese knotweed.
—Melissa Locker, Southern Living, 7 Sep. 2023
The erosion caused by knotweed also drives off fish and wildlife.
—Claire Reid, Journal Sentinel, 8 Aug. 2023
From Japanese knotweed to kudzu vines, these invasive species cause problems throughout the world.
—Ed Yong, Discover Magazine, 5 Mar. 2012
See all Example Sentences for knotweed 
Melissa Locker, Southern Living, 7 Sep. 2023
Weed killers can also help in the process of removing Japanese knotweed.
—Melissa Locker, Southern Living, 7 Sep. 2023
The erosion caused by knotweed also drives off fish and wildlife.
—Claire Reid, Journal Sentinel, 8 Aug. 2023
From Japanese knotweed to kudzu vines, these invasive species cause problems throughout the world.
—Ed Yong, Discover Magazine, 5 Mar. 2012
See all Example Sentences for knotweed
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'knotweed.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Knotweed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knotweed. Accessed 27 Jul. 2024.
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