"thitherto" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thither",
        "3": "to"
      },
      "expansion": "thither + to",
      "name": "compound"
    }
  ],
  "etymology_text": "thither + to",
  "forms": [
    {
      "form": "more thitherto",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most thitherto",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thitherto (comparative more thitherto, superlative most thitherto)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1874, Ernest Myers, transl., The Extant Odes of Pindar, translated into English, Olympian Ode II, page 8",
          "text": "Ay but to mortals the day of death is certain never, […] the Days, with good thitherto unfailing; […]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "thereto, to that point"
      ],
      "id": "en-thitherto-en-adv-2cxIiAxk",
      "links": [
        [
          "thereto",
          "thereto"
        ]
      ],
      "raw_glosses": [
        "(archaic) thereto, to that point"
      ],
      "related": [
        {
          "word": "thither"
        },
        {
          "word": "hitherto"
        },
        {
          "word": "whitherto"
        },
        {
          "word": "thereunto"
        }
      ],
      "tags": [
        "archaic"
      ],
      "translations": [
        {
          "code": "bg",
          "lang": "Bulgarian",
          "roman": "dotogava",
          "sense": "(archaic) thereto, to that point",
          "word": "дотогава"
        },
        {
          "code": "eo",
          "lang": "Esperanto",
          "sense": "(archaic) thereto, to that point",
          "word": "ĝis tiam"
        },
        {
          "code": "is",
          "lang": "Icelandic",
          "sense": "(archaic) thereto, to that point",
          "word": "þangað til"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "(archaic) thereto, to that point",
          "word": "até então"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "(archaic) thereto, to that point",
          "word": "dittills"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "(archaic) thereto, to that point",
          "word": "dittilldags"
        }
      ]
    }
  ],
  "word": "thitherto"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "thither",
        "3": "to"
      },
      "expansion": "thither + to",
      "name": "compound"
    }
  ],
  "etymology_text": "thither + to",
  "forms": [
    {
      "form": "more thitherto",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most thitherto",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "thitherto (comparative more thitherto, superlative most thitherto)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "related": [
    {
      "word": "thither"
    },
    {
      "word": "hitherto"
    },
    {
      "word": "whitherto"
    },
    {
      "word": "thereunto"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adverbs",
        "English compound terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms with archaic senses",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1874, Ernest Myers, transl., The Extant Odes of Pindar, translated into English, Olympian Ode II, page 8",
          "text": "Ay but to mortals the day of death is certain never, […] the Days, with good thitherto unfailing; […]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "thereto, to that point"
      ],
      "links": [
        [
          "thereto",
          "thereto"
        ]
      ],
      "raw_glosses": [
        "(archaic) thereto, to that point"
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "translations": [
    {
      "code": "bg",
      "lang": "Bulgarian",
      "roman": "dotogava",
      "sense": "(archaic) thereto, to that point",
      "word": "дотогава"
    },
    {
      "code": "eo",
      "lang": "Esperanto",
      "sense": "(archaic) thereto, to that point",
      "word": "ĝis tiam"
    },
    {
      "code": "is",
      "lang": "Icelandic",
      "sense": "(archaic) thereto, to that point",
      "word": "þangað til"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "(archaic) thereto, to that point",
      "word": "até então"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "(archaic) thereto, to that point",
      "word": "dittills"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "(archaic) thereto, to that point",
      "word": "dittilldags"
    }
  ],
  "word": "thitherto"
}