"biren" meaning in Basque

{
  "head_templates": [
    {
      "args": {
        "1": "eu",
        "2": "numeral form"
      },
      "expansion": "biren",
      "name": "head"
    }
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Basque entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "40 4 44 12",
          "kind": "other",
          "name": "Old English terms suffixed with -en",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "54 3 40 3",
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "46 2 49 2",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "bi"
        }
      ],
      "glosses": [
        "genitive indefinite of bi"
      ],
      "id": "en-biren-eu-num-NxNK-Rls",
      "links": [
        [
          "bi",
          "bi#Basque"
        ]
      ],
      "tags": [
        "form-of",
        "genitive",
        "indefinite"
      ]
    }
  ],
  "word": "biren"
}

{
  "categories": [
    "Old English adjectives",
    "Old English entries with incorrect language header",
    "Old English lemmas",
    "Old English terms derived from Proto-Germanic",
    "Old English terms derived from Proto-West Germanic",
    "Old English terms inherited from Proto-Germanic",
    "Old English terms inherited from Proto-West Germanic",
    "Old English terms suffixed with -en",
    "Old English terms with IPA pronunciation",
    "Pages with 2 entries",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "eu",
        "2": "numeral form"
      },
      "expansion": "biren",
      "name": "head"
    }
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Basque entries with incorrect language header",
        "Basque non-lemma forms",
        "Basque numeral forms",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "form_of": [
        {
          "word": "bi"
        }
      ],
      "glosses": [
        "genitive indefinite of bi"
      ],
      "links": [
        [
          "bi",
          "bi#Basque"
        ]
      ],
      "tags": [
        "form-of",
        "genitive",
        "indefinite"
      ]
    }
  ],
  "word": "biren"
}