"sistema di riferimento" meaning in All languages combined

{
  "forms": [
    {
      "form": "sistemi di riferimento",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "sistema di riferimento m (plural sistemi di riferimento)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Italian nouns with irregular gender",
          "parents": [
            "Nouns with irregular gender",
            "Irregular nouns",
            "Nouns by inflection type",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "it",
          "name": "Physics",
          "orig": "it:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "frame of reference"
      ],
      "id": "en-sistema_di_riferimento-it-noun-aofpo1SI",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "frame of reference",
          "frame of reference"
        ]
      ],
      "raw_glosses": [
        "(physics) frame of reference"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "sistema di riferimento"
}

{
  "forms": [
    {
      "form": "sistemi di riferimento",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "sistema di riferimento m (plural sistemi di riferimento)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian multiword terms",
        "Italian nouns",
        "Italian nouns with irregular gender",
        "Pages with 1 entry",
        "Pages with entries",
        "it:Physics"
      ],
      "glosses": [
        "frame of reference"
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "frame of reference",
          "frame of reference"
        ]
      ],
      "raw_glosses": [
        "(physics) frame of reference"
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "sistema di riferimento"
}