"high-grade" meaning in English

{
  "antonyms": [
    {
      "word": "low-grade"
    }
  ],
  "forms": [
    {
      "form": "higher grade",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "highest grade",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "higher grade",
        "sup": "highest grade"
      },
      "expansion": "high-grade (comparative higher grade, superlative highest grade)",
      "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"
        }
      ],
      "examples": [
        {
          "text": "The high-grade ore was much more profitable than lower-grade ore.",
          "type": "example"
        },
        {
          "ref": "1961 September, “Talking of Trains: Greater scope for steam”, in Modern Railways, page 517",
          "text": "Were the possibilities of improving the efficiency of British Railways' steam locomotives by making the best use of the reasonably satisfactory low-grade lump coal available today, and thereby saving more high-grade locomotive coal, borne in mind when it was decided to go ahead rapidly with replacement of steam traction?",
          "type": "quotation"
        },
        {
          "ref": "2021 September 8, “Network News: RMT on \"war footing\" in response to workforce cutback threats”, in RAIL, number 939, page 15",
          "text": "Strikes are now due to take place on [...], while conductors also remain under instruction not to work any rest days or to undertake any higher-grade duties until further notice.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Of high quality, particularly good."
      ],
      "id": "en-high-grade-en-adj-lfpLHzQi",
      "links": [
        [
          "quality",
          "quality"
        ]
      ],
      "related": [
        {
          "word": "top-grade"
        }
      ],
      "translations": [
        {
          "code": "bg",
          "lang": "Bulgarian",
          "roman": "visokokačestven",
          "sense": "of high quality",
          "word": "висококачествен"
        },
        {
          "code": "bg",
          "lang": "Bulgarian",
          "roman": "pǎrvoklasen",
          "sense": "of high quality",
          "word": "първокласен"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "of high quality",
          "word": "høyverdig"
        }
      ]
    }
  ],
  "word": "high-grade"
}

{
  "antonyms": [
    {
      "word": "low-grade"
    }
  ],
  "forms": [
    {
      "form": "higher grade",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "highest grade",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "higher grade",
        "sup": "highest grade"
      },
      "expansion": "high-grade (comparative higher grade, superlative highest grade)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "top-grade"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "The high-grade ore was much more profitable than lower-grade ore.",
          "type": "example"
        },
        {
          "ref": "1961 September, “Talking of Trains: Greater scope for steam”, in Modern Railways, page 517",
          "text": "Were the possibilities of improving the efficiency of British Railways' steam locomotives by making the best use of the reasonably satisfactory low-grade lump coal available today, and thereby saving more high-grade locomotive coal, borne in mind when it was decided to go ahead rapidly with replacement of steam traction?",
          "type": "quotation"
        },
        {
          "ref": "2021 September 8, “Network News: RMT on \"war footing\" in response to workforce cutback threats”, in RAIL, number 939, page 15",
          "text": "Strikes are now due to take place on [...], while conductors also remain under instruction not to work any rest days or to undertake any higher-grade duties until further notice.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Of high quality, particularly good."
      ],
      "links": [
        [
          "quality",
          "quality"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "bg",
      "lang": "Bulgarian",
      "roman": "visokokačestven",
      "sense": "of high quality",
      "word": "висококачествен"
    },
    {
      "code": "bg",
      "lang": "Bulgarian",
      "roman": "pǎrvoklasen",
      "sense": "of high quality",
      "word": "първокласен"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "of high quality",
      "word": "høyverdig"
    }
  ],
  "word": "high-grade"
}