"second line" meaning in English

{
  "forms": [
    {
      "form": "second lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second line (plural second lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Military",
          "orig": "en:Military",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The second battle line used to support the front line."
      ],
      "id": "en-second_line-en-noun-uzcutUTo",
      "links": [
        [
          "military",
          "military"
        ],
        [
          "battle line",
          "battle line"
        ],
        [
          "support",
          "support"
        ],
        [
          "front line",
          "front line"
        ]
      ],
      "raw_glosses": [
        "(military) The second battle line used to support the front line."
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "New Orleans English",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "16 84",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The group of dancers, musicians, performers, etc. who are the second part of a traditional New Orleans parade, originally only for funerals but more recently as part of any celebration."
      ],
      "id": "en-second_line-en-noun-dmlFomi0",
      "links": [
        [
          "dancer",
          "dancer"
        ],
        [
          "musician",
          "musician"
        ],
        [
          "performer",
          "performer"
        ],
        [
          "traditional",
          "traditional"
        ],
        [
          "New Orleans",
          "New Orleans"
        ],
        [
          "parade",
          "parade"
        ],
        [
          "funeral",
          "funeral"
        ],
        [
          "celebration",
          "celebration"
        ]
      ],
      "qualifier": "New Orleans",
      "raw_glosses": [
        "(New Orleans) The group of dancers, musicians, performers, etc. who are the second part of a traditional New Orleans parade, originally only for funerals but more recently as part of any celebration."
      ]
    }
  ],
  "word": "second line"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "second lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second line (plural second lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Military"
      ],
      "glosses": [
        "The second battle line used to support the front line."
      ],
      "links": [
        [
          "military",
          "military"
        ],
        [
          "battle line",
          "battle line"
        ],
        [
          "support",
          "support"
        ],
        [
          "front line",
          "front line"
        ]
      ],
      "raw_glosses": [
        "(military) The second battle line used to support the front line."
      ],
      "topics": [
        "government",
        "military",
        "politics",
        "war"
      ]
    },
    {
      "categories": [
        "New Orleans English"
      ],
      "glosses": [
        "The group of dancers, musicians, performers, etc. who are the second part of a traditional New Orleans parade, originally only for funerals but more recently as part of any celebration."
      ],
      "links": [
        [
          "dancer",
          "dancer"
        ],
        [
          "musician",
          "musician"
        ],
        [
          "performer",
          "performer"
        ],
        [
          "traditional",
          "traditional"
        ],
        [
          "New Orleans",
          "New Orleans"
        ],
        [
          "parade",
          "parade"
        ],
        [
          "funeral",
          "funeral"
        ],
        [
          "celebration",
          "celebration"
        ]
      ],
      "qualifier": "New Orleans",
      "raw_glosses": [
        "(New Orleans) The group of dancers, musicians, performers, etc. who are the second part of a traditional New Orleans parade, originally only for funerals but more recently as part of any celebration."
      ]
    }
  ],
  "word": "second line"
}