[ not-weed ]
/ ˈnɒtˌwid /


any of several knotty-stemmed plants belonging to the genus Polygonum, of the buckwheat family.

Nearby words

  1. knotted,
  2. knotter,
  3. knotting,
  4. knotty,
  5. knotty rhatany,
  6. knotwork,
  7. knout,
  8. know,
  9. know a thing or two,
  10. know all the answers

Origin of knotweed

First recorded in 1570–80; knot1 + weed1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for knotweed

  • Japanese knotweed, for all its invasive attributes, was an ornamental plant for the Victorians.

    The Best of Brit Lit|Peter Stothard|December 17, 2010|DAILY BEAST
  • Those of us who are gardeners will certainly agree that “unfortraedde” is the right name for knotweed.

    The Old English Herbals|Eleanour Sinclair Rohde
  • It is Polygonum Virginicum, and so far without a common name, unless Virginia knotweed be satisfactory.

    Seed Dispersal|William J. Beal

British Dictionary definitions for knotweed


/ (ˈnɒtˌwiːd) /


any of several polygonaceous plants of the genus Polygonum, having small flowers and jointed stems
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012