: 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
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Japanese knotweed Japanese knotweed (Fallopia japonic), pictured above, is a species native to eastern Asia that has been wreaking havoc in North America and in the U.K.
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Devika Rao, theweek, 9 Sep. 2024
Asian carp, for instance, or global warming in general, or evils as small as the spotted lanternfly and visible as 15-foot-tall stalks of knotweed.
—Neal Rubin, Detroit Free Press, 1 Aug. 2024
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
See all Example Sentences for knotweed 
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Devika Rao, theweek, 9 Sep. 2024
Asian carp, for instance, or global warming in general, or evils as small as the spotted lanternfly and visible as 15-foot-tall stalks of knotweed.
—Neal Rubin, Detroit Free Press, 1 Aug. 2024
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
See all Example Sentences for knotweed
Dictionary Entries Near knotweed
Cite this Entry
“Knotweed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knotweed. Accessed 22 Dec. 2024.
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