"joueur de premier but" meaning in French

{
  "forms": [
    {
      "form": "joueurs de premier but",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "joueur de premier but m (plural joueurs de premier but)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Baseball",
          "orig": "fr:Baseball",
          "parents": [
            "Ball games",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "first baseman"
      ],
      "id": "en-joueur_de_premier_but-fr-noun-0rdpshZQ",
      "links": [
        [
          "baseball",
          "baseball"
        ],
        [
          "first baseman",
          "first baseman"
        ]
      ],
      "raw_glosses": [
        "(baseball) first baseman"
      ],
      "synonyms": [
        {
          "word": "premier but[ellipsis]]>"
        }
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "ball-games",
        "baseball",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʒwœʁ də pʁə.mje byt/"
    },
    {
      "ipa": "/ʒwœʁ də pʁə.mje by/"
    }
  ],
  "word": "joueur de premier but"
}

{
  "forms": [
    {
      "form": "joueurs de premier but",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "joueur de premier but m (plural joueurs de premier but)",
      "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",
        "fr:Baseball"
      ],
      "glosses": [
        "first baseman"
      ],
      "links": [
        [
          "baseball",
          "baseball"
        ],
        [
          "first baseman",
          "first baseman"
        ]
      ],
      "raw_glosses": [
        "(baseball) first baseman"
      ],
      "synonyms": [
        {
          "word": "premier but[ellipsis]]>"
        }
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "ball-games",
        "baseball",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʒwœʁ də pʁə.mje byt/"
    },
    {
      "ipa": "/ʒwœʁ də pʁə.mje by/"
    }
  ],
  "word": "joueur de premier but"
}