"prehistorically" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "prehistoric",
        "3": "ally"
      },
      "expansion": "prehistoric + -ally",
      "name": "suffix"
    }
  ],
  "etymology_text": "From prehistoric + -ally.",
  "forms": [
    {
      "form": "more prehistorically",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most prehistorically",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "prehistorically (comparative more prehistorically, superlative most prehistorically)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "glosses": [
        "In a prehistoric manner."
      ],
      "id": "en-prehistorically-en-adv-AKjX6XGZ",
      "links": [
        [
          "prehistoric",
          "prehistoric"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "21 79",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "7 93",
          "kind": "other",
          "name": "English terms suffixed with -ally",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "7 93",
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "7 93",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 96",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "9 91",
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "13 87",
          "kind": "other",
          "name": "Terms with Georgian translations",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 96",
          "kind": "other",
          "name": "Terms with Italian translations",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Regarding prehistory."
      ],
      "id": "en-prehistorically-en-adv-VfZQ1GLk",
      "links": [
        [
          "prehistory",
          "prehistory"
        ]
      ],
      "translations": [
        {
          "_dis1": "39 61",
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "esihistoriallisesti"
        },
        {
          "_dis1": "39 61",
          "code": "ka",
          "lang": "Georgian",
          "roman": "ṗreisṭoriulad",
          "sense": "Translations",
          "word": "პრეისტორიულად"
        },
        {
          "_dis1": "39 61",
          "code": "ka",
          "lang": "Georgian",
          "roman": "c̣inareisṭoriulad",
          "sense": "Translations",
          "word": "წინარეისტორიულად"
        },
        {
          "_dis1": "39 61",
          "code": "ka",
          "lang": "Georgian",
          "roman": "c̣inaisṭoriulad",
          "sense": "Translations",
          "word": "წინაისტორიულად"
        },
        {
          "_dis1": "39 61",
          "code": "it",
          "lang": "Italian",
          "sense": "Translations",
          "word": "preistoricamente"
        }
      ]
    }
  ],
  "word": "prehistorically"
}

{
  "categories": [
    "English adverbs",
    "English entries with incorrect language header",
    "English lemmas",
    "English terms suffixed with -ally",
    "Entries with translation boxes",
    "Pages with 1 entry",
    "Pages with entries",
    "Terms with Finnish translations",
    "Terms with Georgian translations",
    "Terms with Italian translations",
    "Translation table header lacks gloss"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "prehistoric",
        "3": "ally"
      },
      "expansion": "prehistoric + -ally",
      "name": "suffix"
    }
  ],
  "etymology_text": "From prehistoric + -ally.",
  "forms": [
    {
      "form": "more prehistorically",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most prehistorically",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "prehistorically (comparative more prehistorically, superlative most prehistorically)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "glosses": [
        "In a prehistoric manner."
      ],
      "links": [
        [
          "prehistoric",
          "prehistoric"
        ]
      ]
    },
    {
      "glosses": [
        "Regarding prehistory."
      ],
      "links": [
        [
          "prehistory",
          "prehistory"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "esihistoriallisesti"
    },
    {
      "code": "ka",
      "lang": "Georgian",
      "roman": "ṗreisṭoriulad",
      "sense": "Translations",
      "word": "პრეისტორიულად"
    },
    {
      "code": "ka",
      "lang": "Georgian",
      "roman": "c̣inareisṭoriulad",
      "sense": "Translations",
      "word": "წინარეისტორიულად"
    },
    {
      "code": "ka",
      "lang": "Georgian",
      "roman": "c̣inaisṭoriulad",
      "sense": "Translations",
      "word": "წინაისტორიულად"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "Translations",
      "word": "preistoricamente"
    }
  ],
  "word": "prehistorically"
}