knotweed

noun
knot·​weed | \ ˈnät-ˌwēd How to pronounce knotweed (audio) \

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 The park is currently fighting against invasives like phragmites, hybrid cattail, buckthorn, Japanese knotweed and even wetland species like purple loosestrife. Morgan Greene, chicagotribune.com, "‘What we need is more goats’: How Thelma and her sister Louise are helping to protect Indiana Dunes National Park," 25 Oct. 2019 The goats were first used on the knotweed patch in South Windsor in June. Peter Marteka, courant.com, "South Windsor using ‘goatscaping’ to control invasive plants," 7 Sep. 2019 Vincent Stetson, the town’s tree warden, has been working on finding natural ways to control the knotweed. Peter Marteka, courant.com, "South Windsor using ‘goatscaping’ to control invasive plants," 7 Sep. 2019 Her photographs are frank and blunt in their acceptance of chain link, barbed wire, mud and smothering mounds of knotweed. Steven Litt, cleveland.com, "Cuyahoga 50 photo shows uncover fresh takes on the recovery of a once combustible river," 30 June 2019 Likewise, kudzu makes great salsa, and Japanese knotweed can be treated like rhubarb. Amanda Foreman, WSJ, "Overrun by Alien Species," 1 Nov. 2018 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

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.

See More

First Known Use of knotweed

1884, in the meaning defined above

Keep scrolling for more

Learn More about knotweed

Time Traveler for knotweed

Time Traveler

The first known use of knotweed was in 1884

See more words from the same year

Statistics for knotweed

Last Updated

23 Nov 2019

Cite this Entry

“Knotweed.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/knotweed. Accessed 11 December 2019.

More from Merriam-Webster on knotweed

Rhyming Dictionary: Words that rhyme with knotweed

Comments on knotweed

What made you want to look up knotweed? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

heavy with or as if with moisture

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!