"売れ線" meaning in Japanese

{
  "forms": [
    {
      "form": "売れ線",
      "ruby": [
        [
          "売",
          "う"
        ],
        [
          "線",
          "せん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "uresen",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "うれせん",
      "roman": "uresen",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "うれせん",
        "hhira": "うれせん"
      },
      "expansion": "売(う)れ線(せん) • (uresen) ^(←うれせん (uresen)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Business",
          "orig": "ja:Business",
          "parents": [
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "that which sells"
      ],
      "id": "en-売れ線-ja-noun-H0RKx5lx",
      "links": [
        [
          "business",
          "business"
        ],
        [
          "sell",
          "sell"
        ]
      ],
      "raw_glosses": [
        "(business) that which sells"
      ],
      "topics": [
        "business"
      ]
    }
  ],
  "sounds": [
    {
      "other": "うれせん"
    },
    {
      "ipa": "[ɯ̟ᵝɾe̞sẽ̞ɴ]"
    }
  ],
  "word": "売れ線"
}

{
  "forms": [
    {
      "form": "売れ線",
      "ruby": [
        [
          "売",
          "う"
        ],
        [
          "線",
          "せん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "uresen",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "うれせん",
      "roman": "uresen",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "うれせん",
        "hhira": "うれせん"
      },
      "expansion": "売(う)れ線(せん) • (uresen) ^(←うれせん (uresen)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with two Han script characters",
        "ja:Business"
      ],
      "glosses": [
        "that which sells"
      ],
      "links": [
        [
          "business",
          "business"
        ],
        [
          "sell",
          "sell"
        ]
      ],
      "raw_glosses": [
        "(business) that which sells"
      ],
      "topics": [
        "business"
      ]
    }
  ],
  "sounds": [
    {
      "other": "うれせん"
    },
    {
      "ipa": "[ɯ̟ᵝɾe̞sẽ̞ɴ]"
    }
  ],
  "word": "売れ線"
}

{
  "called_from": "parser/304",
  "msg": "HTML tag <span> not properly closed",
  "path": [
    "売れ線"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "売れ線",
  "trace": "started on line 2, detected on line 2"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "売れ線"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "売れ線",
  "trace": ""
}