"平面" meaning in Japanese

{
  "antonyms": [
    {
      "english": "solid",
      "roman": "rittai",
      "ruby": [
        [
          "立体",
          "りったい"
        ]
      ],
      "word": "立体"
    }
  ],
  "forms": [
    {
      "form": "平面",
      "ruby": [
        [
          "平",
          "へい"
        ],
        [
          "面",
          "めん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "heimen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "へいめん"
      },
      "expansion": "平(へい)面(めん) • (heimen)",
      "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 wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 2 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Geometry",
          "orig": "ja:Geometry",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Graph theory",
          "orig": "ja:Graph theory",
          "parents": [
            "Mathematics",
            "Visualization",
            "Formal sciences",
            "Computing",
            "Interdisciplinary fields",
            "Sciences",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Mathematics",
          "orig": "ja:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "plane (level or flat surface)"
      ],
      "id": "en-平面-ja-noun-MCgf2W0k",
      "links": [
        [
          "plane",
          "plane"
        ]
      ],
      "related": [
        {
          "english": "square",
          "roman": "heihō",
          "ruby": [
            [
              "平方",
              "へいほう"
            ]
          ],
          "word": "平方"
        },
        {
          "english": "area",
          "roman": "menseki",
          "ruby": [
            [
              "面積",
              "めんせき"
            ]
          ],
          "word": "面積"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[he̞ːmẽ̞ɴ]"
    }
  ],
  "word": "平面"
}

{
  "antonyms": [
    {
      "english": "solid",
      "roman": "rittai",
      "ruby": [
        [
          "立体",
          "りったい"
        ]
      ],
      "word": "立体"
    }
  ],
  "forms": [
    {
      "form": "平面",
      "ruby": [
        [
          "平",
          "へい"
        ],
        [
          "面",
          "めん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "heimen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "へいめん"
      },
      "expansion": "平(へい)面(めん) • (heimen)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "related": [
    {
      "english": "square",
      "roman": "heihō",
      "ruby": [
        [
          "平方",
          "へいほう"
        ]
      ],
      "word": "平方"
    },
    {
      "english": "area",
      "roman": "menseki",
      "ruby": [
        [
          "面積",
          "めんせき"
        ]
      ],
      "word": "面積"
    }
  ],
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with third grade kanji",
        "Japanese terms with 2 kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with IPA pronunciation missing pitch accent",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Pages with 4 entries",
        "Pages with entries",
        "ja:Geometry",
        "ja:Graph theory",
        "ja:Mathematics"
      ],
      "glosses": [
        "plane (level or flat surface)"
      ],
      "links": [
        [
          "plane",
          "plane"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[he̞ːmẽ̞ɴ]"
    }
  ],
  "word": "平面"
}

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