"遡行" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞 サ変動詞",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "そこう"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "glosses": [
        "水流を遡上して行くこと。"
      ],
      "id": "ja-遡行-ja-noun--Ooici5y"
    },
    {
      "glosses": [
        "時間や推移、派生の流れなどをさかのぼること。"
      ],
      "id": "ja-遡行-ja-noun-VXcIQ1hZ"
    }
  ],
  "word": "遡行"
}

{
  "categories": [
    "日本語",
    "日本語 名詞",
    "日本語 名詞 サ変動詞"
  ],
  "forms": [
    {
      "form": "そこう"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "glosses": [
        "水流を遡上して行くこと。"
      ]
    },
    {
      "glosses": [
        "時間や推移、派生の流れなどをさかのぼること。"
      ]
    }
  ],
  "word": "遡行"
}