"BM" meaning in Spanish

{
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "BM m",
      "name": "es-proper noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "World Bank",
          "word": "Banco Mundial"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 6 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "initialism of Banco Mundial (“World Bank”)"
      ],
      "id": "en-BM-es-name-Qq8pX3gI",
      "links": [
        [
          "Banco Mundial",
          "Banco Mundial#Spanish"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism",
        "masculine"
      ]
    }
  ],
  "word": "BM"
}

{
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "BM m",
      "name": "es-proper noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "World Bank",
          "word": "Banco Mundial"
        }
      ],
      "categories": [
        "Pages with 6 entries",
        "Pages with entries",
        "Spanish entries with incorrect language header",
        "Spanish initialisms",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish proper nouns",
        "Spanish uncountable proper nouns"
      ],
      "glosses": [
        "initialism of Banco Mundial (“World Bank”)"
      ],
      "links": [
        [
          "Banco Mundial",
          "Banco Mundial#Spanish"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism",
        "masculine"
      ]
    }
  ],
  "word": "BM"
}