"△" meaning in Japanese

{
  "coordinate_terms": [
    {
      "_dis1": "0 0",
      "word": "◎"
    },
    {
      "_dis1": "0 0",
      "word": "○"
    },
    {
      "_dis1": "0 0",
      "word": "×"
    }
  ],
  "etymology_text": "Literally 'three angles' (三角), referring to the shape of a triangle. Most likely coined in analogy with ○.",
  "forms": [
    {
      "form": "△",
      "ruby": [
        [
          "△ ",
          "さんかく"
        ]
      ],
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "symbol",
        "2": "さんかく"
      },
      "expansion": "△(さんかく)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "not so good"
      ],
      "id": "en-△-ja-noun-b0uqLRuU"
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Accounting",
          "orig": "ja:Accounting",
          "parents": [
            "Finance",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "3 97",
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "12 88",
          "kind": "other",
          "name": "Japanese symbols",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "8 92",
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "minus, equivalent of parentheses in English"
      ],
      "id": "en-△-ja-noun-1BBiOSEX",
      "links": [
        [
          "accounting",
          "accounting#Noun"
        ],
        [
          "minus",
          "minus"
        ]
      ],
      "raw_glosses": [
        "(accounting) minus, equivalent of parentheses in English"
      ],
      "topics": [
        "accounting",
        "business",
        "finance"
      ]
    }
  ],
  "word": "△"
}

{
  "categories": [
    "Japanese entries with incorrect language header",
    "Japanese lemmas",
    "Japanese symbols",
    "Japanese terms with non-redundant non-automated sortkeys"
  ],
  "coordinate_terms": [
    {
      "word": "◎"
    },
    {
      "word": "○"
    },
    {
      "word": "×"
    }
  ],
  "etymology_text": "Literally 'three angles' (三角), referring to the shape of a triangle. Most likely coined in analogy with ○.",
  "forms": [
    {
      "form": "△",
      "ruby": [
        [
          "△ ",
          "さんかく"
        ]
      ],
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "symbol",
        "2": "さんかく"
      },
      "expansion": "△(さんかく)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "not so good"
      ]
    },
    {
      "categories": [
        "ja:Accounting"
      ],
      "glosses": [
        "minus, equivalent of parentheses in English"
      ],
      "links": [
        [
          "accounting",
          "accounting#Noun"
        ],
        [
          "minus",
          "minus"
        ]
      ],
      "raw_glosses": [
        "(accounting) minus, equivalent of parentheses in English"
      ],
      "topics": [
        "accounting",
        "business",
        "finance"
      ]
    }
  ],
  "word": "△"
}