"ΕΣΣΔ" meaning in Greek

{
  "forms": [
    {
      "form": "ESSD",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "ΕΣΣΔ • (ESSD) f",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Énosi Sovietikón Sosialistikón Dimokratión, “USSR”",
          "word": "Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Greek links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "el",
          "name": "Countries",
          "orig": "el:Countries",
          "parents": [
            "Polities",
            "Places",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "el",
          "name": "Countries in Europe",
          "orig": "el:Countries in Europe",
          "parents": [
            "Countries",
            "Places",
            "Europe",
            "Polities",
            "Names",
            "Earth",
            "Eurasia",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Nature",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών (Énosi Sovietikón Sosialistikón Dimokratión, “USSR”)."
      ],
      "id": "en-ΕΣΣΔ-el-name-n90fNyHN",
      "links": [
        [
          "Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών",
          "Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών#Greek"
        ],
        [
          "USSR",
          "USSR"
        ]
      ],
      "related": [
        {
          "english": "Soviet Union",
          "roman": "Sovietikí Énosi",
          "sense": "see",
          "tags": [
            "feminine"
          ],
          "word": "Σοβιετική Ένωση"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "ΕΣΣΔ"
}

{
  "forms": [
    {
      "form": "ESSD",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "proper noun",
        "g": "f"
      },
      "expansion": "ΕΣΣΔ • (ESSD) f",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "name",
  "related": [
    {
      "english": "Soviet Union",
      "roman": "Sovietikí Énosi",
      "sense": "see",
      "tags": [
        "feminine"
      ],
      "word": "Σοβιετική Ένωση"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Énosi Sovietikón Sosialistikón Dimokratión, “USSR”",
          "word": "Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών"
        }
      ],
      "categories": [
        "Greek entries with incorrect language header",
        "Greek feminine nouns",
        "Greek initialisms",
        "Greek lemmas",
        "Greek links with redundant wikilinks",
        "Greek proper nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "el:Countries",
        "el:Countries in Europe"
      ],
      "glosses": [
        "Initialism of Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών (Énosi Sovietikón Sosialistikón Dimokratión, “USSR”)."
      ],
      "links": [
        [
          "Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών",
          "Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών#Greek"
        ],
        [
          "USSR",
          "USSR"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "ΕΣΣΔ"
}