"low grade" meaning in English

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      "expansion": "low grade",
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "low-grade"
        }
      ],
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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      ],
      "glosses": [
        "Alternative form of low-grade"
      ],
      "id": "en-low_grade-en-adj-kpdMgAaa",
      "links": [
        [
          "low-grade",
          "low-grade#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
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    }
  ],
  "word": "low grade"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "low grade",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "low-grade"
        }
      ],
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        "English lemmas",
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      ],
      "glosses": [
        "Alternative form of low-grade"
      ],
      "links": [
        [
          "low-grade",
          "low-grade#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "low grade"
}