"nulle" meaning in Lets

{
  "categories": [
    {
      "kind": "other",
      "name": "Hoofdtelwoord in het Lets",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Woorden in het Lets",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Lets",
  "lang_code": "lv",
  "pos": "num",
  "pos_title": "Hoofdtelwoord",
  "senses": [
    {
      "glosses": [
        "nul"
      ],
      "id": "nl-nulle-lv-num-meYkJ1kB"
    }
  ],
  "word": "nulle"
}

{
  "categories": [
    "Hoofdtelwoord in het Lets",
    "Woorden in het Lets"
  ],
  "lang": "Lets",
  "lang_code": "lv",
  "pos": "num",
  "pos_title": "Hoofdtelwoord",
  "senses": [
    {
      "glosses": [
        "nul"
      ]
    }
  ],
  "word": "nulle"
}