"flyaway grass" meaning in English

{
  "etymology_text": "So called from its light panicle, which is blown across great distances by the wind.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "flyaway grass (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Poeae tribe grasses",
          "orig": "en:Poeae tribe grasses",
          "parents": [
            "Grasses",
            "Commelinids",
            "Plants",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The hair grass Agrostis scabra."
      ],
      "id": "en-flyaway_grass-en-noun-ca1sFis6",
      "links": [
        [
          "hair grass",
          "hair grass"
        ],
        [
          "Agrostis scabra",
          "Agrostis scabra#Translingual"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-æs"
    }
  ],
  "word": "flyaway grass"
}

{
  "etymology_text": "So called from its light panicle, which is blown across great distances by the wind.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "flyaway grass (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:English/æs",
        "Rhymes:English/æs/4 syllables",
        "en:Poeae tribe grasses"
      ],
      "glosses": [
        "The hair grass Agrostis scabra."
      ],
      "links": [
        [
          "hair grass",
          "hair grass"
        ],
        [
          "Agrostis scabra",
          "Agrostis scabra#Translingual"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-æs"
    }
  ],
  "word": "flyaway grass"
}