Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A low-growing, weedy grass (Paspalum distichum) with spikelets arranged in two rows along the rachis.
  • noun Any of several weedy plants of the genus Polygonum having stems with nodes.

from The Century Dictionary.

  • noun A weed of almost world-wide distribution, Polygonum aviculare: so called from the numerous nodes in its stems and its thickly spreading habit.
  • noun By extension, any plant of the genus Polygonum, properly knotweed.
  • noun In occasional use, a plant of some other genus more or less similar.
  • noun Couch-grass: a use of doubtful appropriateness.

from the GNU version of the Collaborative International Dictionary of English.

  • noun a common weed with jointed stems (Polygonum aviculare); knotweed.
  • noun The dog grass. See under dog.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An annual plant, Polygonum aviculare, found in fields and wasteland

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun low-growing weedy grass with spikelets along the leaf stems

Etymologies

Sorry, no etymologies found.

Examples

  • Soon the sound of those words had grown in the field as thick as knotgrass, as thick as cotton.

    Eliza’s Freedom Road

  • But the young woman stood, trying to continue chopping the knotgrass.

    Eliza’s Freedom Road

  • Soon the sound of those words had grown in the field as thick as knotgrass, as thick as cotton.

    Eliza’s Freedom Road

  • Soon the sound of those words had grown in the field as thick as knotgrass, as thick as cotton.

    Eliza’s Freedom Road

  • Soon the sound of those words had grown in the field as thick as knotgrass, as thick as cotton.

    Eliza’s Freedom Road

  • But the young woman stood, trying to continue chopping the knotgrass.

    Eliza’s Freedom Road

  • But the young woman stood, trying to continue chopping the knotgrass.

    Eliza’s Freedom Road

  • But the young woman stood, trying to continue chopping the knotgrass.

    Eliza’s Freedom Road

  • Leonoa had survived by a blade-thin chance, and even so, she lay four days in a stupor, waking for an evening before lapsing into bone fever, its delirious contortions permanently thwarting her spine's straightness, lengthening one arm and legs, and throwing the plates of her skull awry, gnarling her like a knotgrass doll.

    Cat Rambo

  • 'Hold it,' said Hagrid abruptly, just as Harry and Hermione were struggling through a patch of thick knotgrass behind him.

    Harry Potter and the Order of the Phoenix

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