"midriver" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mid",
        "3": "river"
      },
      "expansion": "mid- + river",
      "name": "prefix"
    }
  ],
  "etymology_text": "mid- + river",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "midriver (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English hybridisms",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with mid-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2015 August 6, Jenna Schnuer, “At Katmai National Park in Alaska, Bears Rule”, in New York Times",
          "text": "He walked up onto a small patch of land that was in front of us midriver and then strolled back into the water heading downstream, never even looking our way.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "In the middle of a river."
      ],
      "id": "en-midriver-en-adv-n0S9Fkwd",
      "links": [
        [
          "river",
          "river"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "midriver"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mid",
        "3": "river"
      },
      "expansion": "mid- + river",
      "name": "prefix"
    }
  ],
  "etymology_text": "mid- + river",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "midriver (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "English adverbs",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English hybridisms",
        "English lemmas",
        "English terms prefixed with mid-",
        "English terms with quotations",
        "English uncomparable adverbs"
      ],
      "examples": [
        {
          "ref": "2015 August 6, Jenna Schnuer, “At Katmai National Park in Alaska, Bears Rule”, in New York Times",
          "text": "He walked up onto a small patch of land that was in front of us midriver and then strolled back into the water heading downstream, never even looking our way.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "In the middle of a river."
      ],
      "links": [
        [
          "river",
          "river"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "midriver"
}