"measurement problem" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {},
      "expansion": "measurement problem",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Quantum mechanics",
          "orig": "en:Quantum mechanics",
          "parents": [
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The unresolved problem of what causes a wavefunction to collapse into an eigenstate, or whether wavefunctions collapse at all."
      ],
      "id": "en-measurement_problem-en-name-ZUs9gLH1",
      "links": [
        [
          "quantum mechanics",
          "quantum mechanics"
        ],
        [
          "wavefunction",
          "wavefunction"
        ],
        [
          "eigenstate",
          "eigenstate"
        ]
      ],
      "qualifier": "quantum mechanics",
      "raw_glosses": [
        "(quantum mechanics) The unresolved problem of what causes a wavefunction to collapse into an eigenstate, or whether wavefunctions collapse at all."
      ],
      "related": [
        {
          "word": "wavefunction collapse"
        }
      ],
      "synonyms": [
        {
          "word": "quantum measurement problem"
        }
      ],
      "wikipedia": [
        "measurement problem"
      ]
    }
  ],
  "word": "measurement problem"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "measurement problem",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "related": [
    {
      "word": "wavefunction collapse"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English uncountable nouns",
        "en:Quantum mechanics"
      ],
      "glosses": [
        "The unresolved problem of what causes a wavefunction to collapse into an eigenstate, or whether wavefunctions collapse at all."
      ],
      "links": [
        [
          "quantum mechanics",
          "quantum mechanics"
        ],
        [
          "wavefunction",
          "wavefunction"
        ],
        [
          "eigenstate",
          "eigenstate"
        ]
      ],
      "qualifier": "quantum mechanics",
      "raw_glosses": [
        "(quantum mechanics) The unresolved problem of what causes a wavefunction to collapse into an eigenstate, or whether wavefunctions collapse at all."
      ],
      "wikipedia": [
        "measurement problem"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "quantum measurement problem"
    }
  ],
  "word": "measurement problem"
}