"ΜΡΑ" meaning in All languages combined

{
  "forms": [
    {
      "form": "MRA",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "grc",
        "2": "proper noun",
        "head": "ΜΡΑ"
      },
      "expansion": "ΜΡΑ • (MRA)",
      "name": "head"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "mētéra",
          "word": "μητέρα"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Ancient Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ancient Greek nomina sacra",
          "parents": [
            "Nomina sacra",
            "Abbreviations",
            "Shortenings"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Nomen sacrum form of μητέρα (mētéra)."
      ],
      "id": "en-ΜΡΑ-grc-name-rdoAatBZ",
      "links": [
        [
          "Nomen sacrum",
          "nomen sacrum#English"
        ],
        [
          "μητέρα",
          "μητέρα#Ancient Greek"
        ]
      ],
      "tags": [
        "Nomen-sacrum",
        "alt-of"
      ]
    }
  ],
  "word": "ΜΡΑ"
}

{
  "forms": [
    {
      "form": "MRA",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "grc",
        "2": "proper noun",
        "head": "ΜΡΑ"
      },
      "expansion": "ΜΡΑ • (MRA)",
      "name": "head"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "mētéra",
          "word": "μητέρα"
        }
      ],
      "categories": [
        "Ancient Greek entries with incorrect language header",
        "Ancient Greek lemmas",
        "Ancient Greek nomina sacra",
        "Ancient Greek proper nouns"
      ],
      "glosses": [
        "Nomen sacrum form of μητέρα (mētéra)."
      ],
      "links": [
        [
          "Nomen sacrum",
          "nomen sacrum#English"
        ],
        [
          "μητέρα",
          "μητέρα#Ancient Greek"
        ]
      ],
      "tags": [
        "Nomen-sacrum",
        "alt-of"
      ]
    }
  ],
  "word": "ΜΡΑ"
}