"terminus ante quem" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "terminus",
        "4": "",
        "5": "boundary, limit"
      },
      "expansion": "Latin terminus (“boundary, limit”)",
      "name": "der"
    }
  ],
  "etymology_text": "From the Latin terminus (“boundary, limit”) and ante (“before”) and quem (“which”), the accusative of quī (“what”). Literally meaning \"the limit before which\".",
  "head_templates": [
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      "expansion": "terminus ante quem",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "_dis1": "51 49",
      "word": "terminus post quem"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "_dis": "50 50",
          "kind": "topical",
          "langcode": "en",
          "name": "Time",
          "orig": "en:Time",
          "parents": [
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          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The date before which a document must have been written."
      ],
      "id": "en-terminus_ante_quem-en-noun-MfBeeP~F",
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          "date"
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        [
          "document",
          "document"
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        [
          "written",
          "write"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "17 83",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w+disamb"
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        {
          "_dis": "16 84",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "9 91",
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          "parents": [],
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        },
        {
          "_dis": "50 50",
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          "name": "Time",
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          "parents": [
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "The date before which an archaeological artifact must have been deposited."
      ],
      "id": "en-terminus_ante_quem-en-noun-Ynfd53gP",
      "links": [
        [
          "archaeological",
          "archaeological"
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          "artifact",
          "artifact"
        ],
        [
          "deposit",
          "deposit"
        ]
      ]
    }
  ],
  "word": "terminus ante quem"
}

{
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    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English nouns with unknown or uncertain plurals",
    "English terms derived from Latin",
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    "Pages with entries",
    "en:Time"
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  "etymology_templates": [
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        "2": "la",
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        "4": "",
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      "expansion": "Latin terminus (“boundary, limit”)",
      "name": "der"
    }
  ],
  "etymology_text": "From the Latin terminus (“boundary, limit”) and ante (“before”) and quem (“which”), the accusative of quī (“what”). Literally meaning \"the limit before which\".",
  "head_templates": [
    {
      "args": {
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      "expansion": "terminus ante quem",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "terminus post quem"
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  ],
  "senses": [
    {
      "glosses": [
        "The date before which a document must have been written."
      ],
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        ],
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      ]
    },
    {
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        "The date before which an archaeological artifact must have been deposited."
      ],
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        [
          "archaeological",
          "archaeological"
        ],
        [
          "artifact",
          "artifact"
        ],
        [
          "deposit",
          "deposit"
        ]
      ]
    }
  ],
  "word": "terminus ante quem"
}