"musikkteori" meaning in Norwegian Bokmål

{
  "etymology_templates": [
    {
      "args": {
        "1": "nb",
        "2": "musikk",
        "3": "teori"
      },
      "expansion": "musikk + teori",
      "name": "af"
    }
  ],
  "etymology_text": "From musikk + teori.",
  "forms": [
    {
      "form": "musikkteorien",
      "tags": [
        "definite",
        "singular"
      ]
    }
  ],
  "lang": "Norwegian Bokmål",
  "lang_code": "nb",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Norwegian Bokmål entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "nb",
          "name": "Music",
          "orig": "nb:Music",
          "parents": [
            "Art",
            "Sound",
            "Culture",
            "Energy",
            "Society",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "music theory"
      ],
      "id": "en-musikkteori-nb-noun-qdnKNA5P",
      "links": [
        [
          "music theory",
          "music theory"
        ]
      ],
      "tags": [
        "masculine",
        "uncountable"
      ]
    }
  ],
  "word": "musikkteori"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "nb",
        "2": "musikk",
        "3": "teori"
      },
      "expansion": "musikk + teori",
      "name": "af"
    }
  ],
  "etymology_text": "From musikk + teori.",
  "forms": [
    {
      "form": "musikkteorien",
      "tags": [
        "definite",
        "singular"
      ]
    }
  ],
  "lang": "Norwegian Bokmål",
  "lang_code": "nb",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Norwegian Bokmål compound terms",
        "Norwegian Bokmål entries with incorrect language header",
        "Norwegian Bokmål lemmas",
        "Norwegian Bokmål masculine nouns",
        "Norwegian Bokmål nouns",
        "Norwegian Bokmål uncountable nouns",
        "Pages with 2 entries",
        "Pages with entries",
        "nb:Music"
      ],
      "glosses": [
        "music theory"
      ],
      "links": [
        [
          "music theory",
          "music theory"
        ]
      ],
      "tags": [
        "masculine",
        "uncountable"
      ]
    }
  ],
  "word": "musikkteori"
}