"SSSR" meaning in Italien

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms propres en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Sigles en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "URSS en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Italien",
      "orig": "italien",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Transcription en alphabet latin du cyrillique СССР."
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "name",
  "pos_title": "Nom propre",
  "raw_tags": [
    "Sigle"
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en italien de l’histoire",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en italien du communisme",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pays en italien",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en italien",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "SSSR."
      ],
      "id": "fr-SSSR-it-name-Qr87R09e",
      "raw_tags": [
        "Communisme"
      ],
      "topics": [
        "geography",
        "history"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ɛs.se.ɛs.se.ɛs.se.ˈɛr.re\\"
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "SSSR"
}

{
  "categories": [
    "Noms propres en italien",
    "Sigles en italien",
    "URSS en italien",
    "italien"
  ],
  "etymology_texts": [
    "Transcription en alphabet latin du cyrillique СССР."
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "name",
  "pos_title": "Nom propre",
  "raw_tags": [
    "Sigle"
  ],
  "senses": [
    {
      "categories": [
        "Lexique en italien de l’histoire",
        "Lexique en italien du communisme",
        "Pays en italien",
        "Wiktionnaire:Exemples manquants en italien"
      ],
      "glosses": [
        "SSSR."
      ],
      "raw_tags": [
        "Communisme"
      ],
      "topics": [
        "geography",
        "history"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ɛs.se.ɛs.se.ɛs.se.ˈɛr.re\\"
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "SSSR"
}