"null" meaning in Cimbrian

{
  "etymology_templates": [
    {
      "args": {
        "1": "cim",
        "2": "la",
        "3": "nūllus",
        "4": "",
        "5": "none"
      },
      "expansion": "Latin nūllus (“none”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin nūllus (“none”).",
  "head_templates": [
    {
      "args": {
        "1": "cim",
        "2": "numeral",
        "cat2": "cardinal numbers"
      },
      "expansion": "null",
      "name": "head"
    }
  ],
  "lang": "Cimbrian",
  "lang_code": "cim",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Cimbrian cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Cimbrian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Luserna Cimbrian",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "zero"
      ],
      "id": "en-null-cim-num--RlOc~np",
      "links": [
        [
          "zero",
          "zero"
        ]
      ],
      "raw_glosses": [
        "(Luserna) zero"
      ],
      "tags": [
        "Luserna"
      ]
    }
  ],
  "word": "null"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cim",
        "2": "la",
        "3": "nūllus",
        "4": "",
        "5": "none"
      },
      "expansion": "Latin nūllus (“none”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin nūllus (“none”).",
  "head_templates": [
    {
      "args": {
        "1": "cim",
        "2": "numeral",
        "cat2": "cardinal numbers"
      },
      "expansion": "null",
      "name": "head"
    }
  ],
  "lang": "Cimbrian",
  "lang_code": "cim",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Cimbrian cardinal numbers",
        "Cimbrian entries with incorrect language header",
        "Cimbrian lemmas",
        "Cimbrian numerals",
        "Cimbrian terms derived from Latin",
        "Luserna Cimbrian"
      ],
      "glosses": [
        "zero"
      ],
      "links": [
        [
          "zero",
          "zero"
        ]
      ],
      "raw_glosses": [
        "(Luserna) zero"
      ],
      "tags": [
        "Luserna"
      ]
    }
  ],
  "word": "null"
}