"gradewide" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grade",
        "3": "wide"
      },
      "expansion": "grade + -wide",
      "name": "suffix"
    }
  ],
  "etymology_text": "From grade + -wide.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gradewide (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -wide",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2008 April 19, Jacques Steinberg, “Primary Lures Those Too Young to Vote”, in New York Times:",
          "text": "The children, most 9 or 10, then signaled their preferences for the Democratic nomination in a gradewide straw poll.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Across an entire grade (school year)."
      ],
      "id": "en-gradewide-en-adj-XV4gsTr-",
      "links": [
        [
          "grade",
          "grade"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "gradewide"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grade",
        "3": "wide"
      },
      "expansion": "grade + -wide",
      "name": "suffix"
    }
  ],
  "etymology_text": "From grade + -wide.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gradewide (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -wide",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2008 April 19, Jacques Steinberg, “Primary Lures Those Too Young to Vote”, in New York Times:",
          "text": "The children, most 9 or 10, then signaled their preferences for the Democratic nomination in a gradewide straw poll.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Across an entire grade (school year)."
      ],
      "links": [
        [
          "grade",
          "grade"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "gradewide"
}