"-" meaning in Japanese

{
  "head_templates": [
    {
      "args": {
        "1": "ja",
        "2": "punctuation mark"
      },
      "expansion": "-",
      "name": "head"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "punct",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "To-kyo-"
        }
      ],
      "glosses": [
        "A romanization of the ー (long vowel mark)."
      ],
      "id": "en---ja-punct-m9bpweUF",
      "links": [
        [
          "romanization",
          "romanization"
        ],
        [
          "ー",
          "ー"
        ]
      ],
      "raw_glosses": [
        "(rare) A romanization of the ー (long vowel mark)."
      ],
      "raw_tags": [
        "punctuation"
      ],
      "tags": [
        "rare"
      ]
    }
  ],
  "word": "-"
}

{
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "character",
  "senses": [
    {
      "alt_of": [
        {
          "word": "ム"
        }
      ],
      "categories": [
        {
          "_dis": "72 28",
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "80 20",
          "kind": "other",
          "name": "Japanese terms with non-redundant manual script codes",
          "parents": [
            "Terms with non-redundant manual script codes",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "61 39",
          "kind": "topical",
          "name": "Japanese punctuation marks",
          "parents": [
            "Punctuation marks",
            "Letters, symbols, and punctuation",
            "Symbols",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Visual rendering of Morse code for ム."
      ],
      "id": "en---ja-character-MpcLg1OT",
      "links": [
        [
          "ム",
          "ム#Translingual"
        ]
      ],
      "tags": [
        "alt-of",
        "letter",
        "morse-code",
        "visual-rendering"
      ]
    }
  ],
  "word": "-"
}

{
  "categories": [
    "Japanese entries with incorrect language header",
    "Japanese lemmas",
    "Japanese letters",
    "Japanese punctuation marks",
    "Japanese terms with non-redundant manual script codes"
  ],
  "head_templates": [
    {
      "args": {
        "1": "ja",
        "2": "punctuation mark"
      },
      "expansion": "-",
      "name": "head"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "punct",
  "senses": [
    {
      "categories": [
        "Japanese terms with rare senses"
      ],
      "examples": [
        {
          "text": "To-kyo-"
        }
      ],
      "glosses": [
        "A romanization of the ー (long vowel mark)."
      ],
      "links": [
        [
          "romanization",
          "romanization"
        ],
        [
          "ー",
          "ー"
        ]
      ],
      "raw_glosses": [
        "(rare) A romanization of the ー (long vowel mark)."
      ],
      "raw_tags": [
        "punctuation"
      ],
      "tags": [
        "rare"
      ]
    }
  ],
  "word": "-"
}

{
  "categories": [
    "Japanese entries with incorrect language header",
    "Japanese lemmas",
    "Japanese letters",
    "Japanese punctuation marks",
    "Japanese terms with non-redundant manual script codes"
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "character",
  "senses": [
    {
      "alt_of": [
        {
          "word": "ム"
        }
      ],
      "glosses": [
        "Visual rendering of Morse code for ム."
      ],
      "links": [
        [
          "ム",
          "ム#Translingual"
        ]
      ],
      "tags": [
        "alt-of",
        "letter",
        "morse-code",
        "visual-rendering"
      ]
    }
  ],
  "word": "-"
}