"premier maître" meaning in French

{
  "forms": [
    {
      "form": "premiers maîtres",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "première maître",
      "tags": [
        "feminine"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "f": "+"
      },
      "expansion": "premier maître m (plural premiers maîtres, feminine première maître)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "fr",
          "name": "Military",
          "orig": "fr:Military",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Military rank used in Francophone navies usually equivalent to the army rank of adjudant or the United States Navy rank of senior chief petty officer; first master"
      ],
      "id": "en-premier_maître-fr-noun-LtERhoVf",
      "links": [
        [
          "military",
          "military"
        ],
        [
          "adjudant",
          "adjudant"
        ],
        [
          "senior chief petty officer",
          "senior chief petty officer"
        ],
        [
          "first",
          "first"
        ],
        [
          "master",
          "master"
        ]
      ],
      "raw_glosses": [
        "(military) Military rank used in Francophone navies usually equivalent to the army rank of adjudant or the United States Navy rank of senior chief petty officer; first master"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pʁə.mje mɛtʁ/"
    },
    {
      "audio": "LL-Q150 (fra)-WikiLucas00-premier maître.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/51/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/51/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav.ogg",
      "tags": [
        "France",
        "Lyon"
      ]
    }
  ],
  "word": "premier maître"
}

{
  "forms": [
    {
      "form": "premiers maîtres",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "première maître",
      "tags": [
        "feminine"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "f": "+"
      },
      "expansion": "premier maître m (plural premiers maîtres, feminine première maître)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French multiword terms",
        "French nouns",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Military"
      ],
      "glosses": [
        "Military rank used in Francophone navies usually equivalent to the army rank of adjudant or the United States Navy rank of senior chief petty officer; first master"
      ],
      "links": [
        [
          "military",
          "military"
        ],
        [
          "adjudant",
          "adjudant"
        ],
        [
          "senior chief petty officer",
          "senior chief petty officer"
        ],
        [
          "first",
          "first"
        ],
        [
          "master",
          "master"
        ]
      ],
      "raw_glosses": [
        "(military) Military rank used in Francophone navies usually equivalent to the army rank of adjudant or the United States Navy rank of senior chief petty officer; first master"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pʁə.mje mɛtʁ/"
    },
    {
      "audio": "LL-Q150 (fra)-WikiLucas00-premier maître.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/51/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/51/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav/LL-Q150_%28fra%29-WikiLucas00-premier_ma%C3%AEtre.wav.ogg",
      "tags": [
        "France",
        "Lyon"
      ]
    }
  ],
  "word": "premier maître"
}