"common knotgrass" meaning in English

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      "expansion": "common knotgrass (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Buckwheat family plants",
          "orig": "en:Buckwheat family plants",
          "parents": [
            "Caryophyllales order plants",
            "Plants",
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      ],
      "glosses": [
        "A widespread herb native to Eurasia, found in most temperate regions (Polygonum aviculare)."
      ],
      "id": "en-common_knotgrass-en-noun-KH7do4t4",
      "links": [
        [
          "Polygonum aviculare",
          "Polygonum aviculare#Translingual"
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      ],
      "synonyms": [
        {
          "sense": "Polygonum aviculare",
          "word": "prostrate knotweed"
        },
        {
          "sense": "Polygonum aviculare",
          "word": "birdweed"
        },
        {
          "sense": "Polygonum aviculare",
          "word": "pigweed"
        },
        {
          "sense": "Polygonum aviculare",
          "word": "lowgrass"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "common knotgrass"
}

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      "expansion": "common knotgrass (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A widespread herb native to Eurasia, found in most temperate regions (Polygonum aviculare)."
      ],
      "links": [
        [
          "Polygonum aviculare",
          "Polygonum aviculare#Translingual"
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      ],
      "tags": [
        "uncountable"
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  ],
  "synonyms": [
    {
      "sense": "Polygonum aviculare",
      "word": "prostrate knotweed"
    },
    {
      "sense": "Polygonum aviculare",
      "word": "birdweed"
    },
    {
      "sense": "Polygonum aviculare",
      "word": "pigweed"
    },
    {
      "sense": "Polygonum aviculare",
      "word": "lowgrass"
    }
  ],
  "word": "common knotgrass"
}