"running back" meaning in English

{
  "forms": [
    {
      "form": "running backs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "running back (plural running backs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Football (American)",
          "orig": "en:Football (American)",
          "parents": [
            "Football",
            "Ball games",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "48 52",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "An offensive back whose primary job is to be the ballcarrier."
      ],
      "id": "en-running_back-en-noun-xdrDvxn7",
      "links": [
        [
          "American football",
          "American football"
        ],
        [
          "offensive back",
          "offensive back"
        ],
        [
          "ballcarrier",
          "ballcarrier"
        ]
      ],
      "raw_glosses": [
        "(American football) An offensive back whose primary job is to be the ballcarrier."
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "type of offensive back",
          "word": "keskushyökkääjä"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "type of offensive back",
          "tags": [
            "masculine"
          ],
          "word": "Running Back"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "type of offensive back",
          "word": "Runningback"
        }
      ]
    }
  ],
  "word": "running back"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "running back",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "48 52",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "run back"
        }
      ],
      "glosses": [
        "present participle and gerund of run back"
      ],
      "id": "en-running_back-en-verb-rRCmTIKe",
      "links": [
        [
          "run back",
          "run back#English"
        ]
      ],
      "tags": [
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "running back"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English nouns",
    "English verb forms"
  ],
  "forms": [
    {
      "form": "running backs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "running back (plural running backs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Football (American)"
      ],
      "glosses": [
        "An offensive back whose primary job is to be the ballcarrier."
      ],
      "links": [
        [
          "American football",
          "American football"
        ],
        [
          "offensive back",
          "offensive back"
        ],
        [
          "ballcarrier",
          "ballcarrier"
        ]
      ],
      "raw_glosses": [
        "(American football) An offensive back whose primary job is to be the ballcarrier."
      ],
      "topics": [
        "American-football",
        "ball-games",
        "football",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "type of offensive back",
      "word": "keskushyökkääjä"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "type of offensive back",
      "tags": [
        "masculine"
      ],
      "word": "Running Back"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "type of offensive back",
      "word": "Runningback"
    }
  ],
  "word": "running back"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English nouns",
    "English verb forms"
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "running back",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "run back"
        }
      ],
      "glosses": [
        "present participle and gerund of run back"
      ],
      "links": [
        [
          "run back",
          "run back#English"
        ]
      ],
      "tags": [
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "running back"
}