"left back" meaning in English

{
  "forms": [
    {
      "form": "left backs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "left back (plural left backs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Catalan translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Swedish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Football (soccer)",
          "orig": "en:Football (soccer)",
          "parents": [
            "Football",
            "Ball games",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A defender who normally plays on the left side of the field."
      ],
      "id": "en-left_back-en-noun-Aq7tMPm7",
      "links": [
        [
          "soccer",
          "soccer"
        ],
        [
          "defender",
          "defender"
        ]
      ],
      "raw_glosses": [
        "(soccer) A defender who normally plays on the left side of the field."
      ],
      "related": [
        {
          "word": "centre back"
        },
        {
          "word": "center back"
        },
        {
          "word": "right back"
        }
      ],
      "topics": [
        "ball-games",
        "games",
        "hobbies",
        "lifestyle",
        "soccer",
        "sports"
      ],
      "translations": [
        {
          "code": "ca",
          "lang": "Catalan",
          "sense": "a defender who plays on the left",
          "tags": [
            "masculine"
          ],
          "word": "defensa esquerre"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "a defender who plays on the left",
          "word": "vasen puolustaja"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "a defender who plays on the left",
          "tags": [
            "common-gender"
          ],
          "word": "vänsterback"
        }
      ]
    }
  ],
  "word": "left back"
}

{
  "forms": [
    {
      "form": "left backs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "left back (plural left backs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "centre back"
    },
    {
      "word": "center back"
    },
    {
      "word": "right back"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Catalan translations",
        "Terms with Finnish translations",
        "Terms with Swedish translations",
        "en:Football (soccer)"
      ],
      "glosses": [
        "A defender who normally plays on the left side of the field."
      ],
      "links": [
        [
          "soccer",
          "soccer"
        ],
        [
          "defender",
          "defender"
        ]
      ],
      "raw_glosses": [
        "(soccer) A defender who normally plays on the left side of the field."
      ],
      "topics": [
        "ball-games",
        "games",
        "hobbies",
        "lifestyle",
        "soccer",
        "sports"
      ]
    }
  ],
  "translations": [
    {
      "code": "ca",
      "lang": "Catalan",
      "sense": "a defender who plays on the left",
      "tags": [
        "masculine"
      ],
      "word": "defensa esquerre"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "a defender who plays on the left",
      "word": "vasen puolustaja"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "a defender who plays on the left",
      "tags": [
        "common-gender"
      ],
      "word": "vänsterback"
    }
  ],
  "word": "left back"
}