"angle of depression" meaning in English

{
  "forms": [
    {
      "form": "angles of depression",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "angles of depression"
      },
      "expansion": "angle of depression (plural angles of depression)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Geometry",
          "orig": "en:Geometry",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The angle formed by the line of sight and the horizontal plane for an object below the horizontal."
      ],
      "id": "en-angle_of_depression-en-noun-gkFgwr3l",
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "angle",
          "word": "laskukulma"
        },
        {
          "code": "mi",
          "lang": "Maori",
          "sense": "angle",
          "word": "koki tāheke"
        }
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛʃən"
    }
  ],
  "word": "angle of depression"
}

{
  "forms": [
    {
      "form": "angles of depression",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "angles of depression"
      },
      "expansion": "angle of depression (plural angles of depression)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Rhymes:English/ɛʃən",
        "Rhymes:English/ɛʃən/6 syllables",
        "en:Geometry"
      ],
      "glosses": [
        "The angle formed by the line of sight and the horizontal plane for an object below the horizontal."
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛʃən"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "angle",
      "word": "laskukulma"
    },
    {
      "code": "mi",
      "lang": "Maori",
      "sense": "angle",
      "word": "koki tāheke"
    }
  ],
  "word": "angle of depression"
}