"second-stringer" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "second string",
        "3": "er"
      },
      "expansion": "second string + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "second string + -er",
  "forms": [
    {
      "form": "second-stringers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second-stringer (plural second-stringers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "73 27",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "74 26",
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "79 21",
          "kind": "other",
          "name": "English terms suffixed with -er",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "74 26",
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "62 38",
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A person who plays second string. A person who is kept on a sports team as a backup in case a \"first-string\" player is unavailable."
      ],
      "id": "en-second-stringer-en-noun-hBak3DW2",
      "links": [
        [
          "second string",
          "second string"
        ]
      ]
    },
    {
      "glosses": [
        "A person who is not good enough to be considered proficient but may be useful as a backup."
      ],
      "id": "en-second-stringer-en-noun-vU7JUPZy",
      "links": [
        [
          "proficient",
          "proficient"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "second stringer"
    }
  ],
  "word": "second-stringer"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English entries with topic categories using raw markup",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English terms suffixed with -er",
    "English terms with non-redundant non-automated sortkeys",
    "en:People"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "second string",
        "3": "er"
      },
      "expansion": "second string + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "second string + -er",
  "forms": [
    {
      "form": "second-stringers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second-stringer (plural second-stringers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "A person who plays second string. A person who is kept on a sports team as a backup in case a \"first-string\" player is unavailable."
      ],
      "links": [
        [
          "second string",
          "second string"
        ]
      ]
    },
    {
      "glosses": [
        "A person who is not good enough to be considered proficient but may be useful as a backup."
      ],
      "links": [
        [
          "proficient",
          "proficient"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "second stringer"
    }
  ],
  "word": "second-stringer"
}