"落差" meaning in Japanese

{
  "forms": [
    {
      "form": "落差",
      "ruby": [
        [
          "落",
          "らく"
        ],
        [
          "差",
          "さ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "rakusa",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "らくさ",
      "roman": "rakusa",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "らくさ",
        "hhira": "らくさ"
      },
      "expansion": "落(らく)差(さ) • (rakusa) ^(←らくさ (rakusa)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "ja",
          "name": "Geography",
          "orig": "ja:Geography",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "98 2",
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "96 4",
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "96 4",
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "96 4",
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "96 4",
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "drop in elevation (of a waterfall, between two points in the course of a river, etc.)"
      ],
      "id": "en-落差-ja-noun-Y3vJtyuc",
      "links": [
        [
          "geography",
          "geography"
        ],
        [
          "drop",
          "drop"
        ],
        [
          "elevation",
          "elevation"
        ]
      ],
      "raw_glosses": [
        "(geography) drop in elevation (of a waterfall, between two points in the course of a river, etc.)"
      ],
      "topics": [
        "geography",
        "natural-sciences"
      ]
    },
    {
      "glosses": [
        "discrepancy"
      ],
      "id": "en-落差-ja-noun-EAZUNrQA",
      "links": [
        [
          "discrepancy",
          "discrepancy"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "らくさ"
    },
    {
      "ipa": "[ɾa̠kɯ̟ᵝsa̠]"
    }
  ],
  "word": "落差"
}

{
  "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 fourth grade kanji",
    "Japanese terms spelled with third grade kanji",
    "Japanese terms with IPA pronunciation",
    "Japanese terms with non-redundant non-automated sortkeys",
    "Japanese terms with redundant sortkeys",
    "Japanese terms written with two Han script characters"
  ],
  "forms": [
    {
      "form": "落差",
      "ruby": [
        [
          "落",
          "らく"
        ],
        [
          "差",
          "さ"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "rakusa",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "らくさ",
      "roman": "rakusa",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "らくさ",
        "hhira": "らくさ"
      },
      "expansion": "落(らく)差(さ) • (rakusa) ^(←らくさ (rakusa)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "ja:Geography"
      ],
      "glosses": [
        "drop in elevation (of a waterfall, between two points in the course of a river, etc.)"
      ],
      "links": [
        [
          "geography",
          "geography"
        ],
        [
          "drop",
          "drop"
        ],
        [
          "elevation",
          "elevation"
        ]
      ],
      "raw_glosses": [
        "(geography) drop in elevation (of a waterfall, between two points in the course of a river, etc.)"
      ],
      "topics": [
        "geography",
        "natural-sciences"
      ]
    },
    {
      "glosses": [
        "discrepancy"
      ],
      "links": [
        [
          "discrepancy",
          "discrepancy"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "らくさ"
    },
    {
      "ipa": "[ɾa̠kɯ̟ᵝsa̠]"
    }
  ],
  "word": "落差"
}

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

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