"遡" meaning in Japanese

{
  "forms": [
    {
      "form": "“Jōyō” kanji",
      "tags": [
        "common"
      ]
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "character",
  "senses": [
    {
      "categories": [
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Common kanji",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "67 33",
          "kind": "other",
          "name": "Japanese terms with non-redundant manual transliterations",
          "parents": [
            "Terms with non-redundant manual transliterations",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "83 17",
          "kind": "other",
          "name": "Japanese terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "go upstream"
      ],
      "id": "en-遡-ja-character-07emHvVj",
      "tags": [
        "kanji"
      ]
    },
    {
      "categories": [
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Common kanji",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "retrace the past"
      ],
      "id": "en-遡-ja-character-OHwR4dLr",
      "tags": [
        "kanji"
      ]
    }
  ],
  "word": "遡"
}

{
  "categories": [
    "Common kanji",
    "Japanese Han characters",
    "Japanese kanji with goon reading す",
    "Japanese kanji with kan'on reading そ",
    "Japanese kanji with kun reading さかのぼ-る",
    "Japanese terms spelled with 遡",
    "Japanese terms with non-redundant manual transliterations",
    "Japanese terms with redundant transliterations"
  ],
  "forms": [
    {
      "form": "“Jōyō” kanji",
      "tags": [
        "common"
      ]
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "character",
  "senses": [
    {
      "glosses": [
        "go upstream"
      ],
      "tags": [
        "kanji"
      ]
    },
    {
      "glosses": [
        "retrace the past"
      ],
      "tags": [
        "kanji"
      ]
    }
  ],
  "word": "遡"
}