knotweed

noun
knot·​weed | \ˈnät-ˌwēd \

Definition of knotweed 

: 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

One of the most famous examples is celebrating its 150th anniversary this year: the introduction of Japanese knotweed to the U.S. Amanda Foreman, WSJ, "Overrun by Alien Species," 1 Nov. 2018 Pickled in soy sauce and chili flakes and tempura fried, however, knotweed is tastier than a kale chip. Ryan Knighton, Popular Mechanics, "The Truth Is in the Muck," 6 Oct. 2016 American travelers returning from Japan first brought knotweed to America. Ryan Knighton, Popular Mechanics, "The Truth Is in the Muck," 6 Oct. 2016 Native to the Americas, erect knotweed grows in the moist flood zones near rivers. Annalee Newitz, Ars Technica, "Hunting for the ancient lost farms of North America," 26 Jan. 2018 All very well, of course, if the knotweed is confined to a garden. Christopher Middleton, Newsweek, "Japanese Knotweed: The Invasive Plant That Eats the Value of Your Home," 5 July 2014 Japanese knotweed and New Zealand flatworms are cited as threats. Bloomberg.com, "Brexit Bulletin: Vote Leave Claims Reach the Commons," 27 Mar. 2018 Sometimes, though, the properties attacked by Japanese knotweed are brand new. Christopher Middleton, Newsweek, "Japanese Knotweed: The Invasive Plant That Eats the Value of Your Home," 5 July 2014 His tasting menu that evening included spring garlic, knotweed, herbs foraged at the beach, lovage, rhubarb and a leafy northern plant called orpin with a slightly bitter flavor. Florence Fabricant, New York Times, "Matt Orlando Brings California Sun to Copenhagen," 27 Oct. 2017

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

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First Known Use of knotweed

1884, in the meaning defined above

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Last Updated

23 Nov 2018

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Time Traveler for knotweed

The first known use of knotweed was in 1884

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