"prolusion" meaning in English

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "prolusory"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "-"
      },
      "expansion": "Latin",
      "name": "uder"
    },
    {
      "args": {},
      "expansion": "",
      "name": "lena"
    }
  ],
  "etymology_text": "Latin prolusio, from proludere (“to prelude”).",
  "forms": [
    {
      "form": "prolusions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "prolusion (plural prolusions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "ref": "1854, Arthur Pendennis [pseudonym; William Makepeace Thackeray], The Newcomes: Memoirs of a Most Respectable Family, volume (please specify |volume=I or II), London: Bradbury and Evans, […], →OCLC:",
          "text": "Domestic prolusions.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A trial before the principal performance; a prelude."
      ],
      "id": "en-prolusion-en-noun-HNBmeJM5",
      "links": [
        [
          "trial",
          "trial"
        ],
        [
          "principal",
          "principal"
        ],
        [
          "performance",
          "performance"
        ],
        [
          "prelude",
          "prelude"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "37 63",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "22 78",
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "27 73",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "12 88",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1822, [Walter Scott], Peveril of the Peak. […], volume (please specify |volume=I to IV), Edinburgh: […] Archibald Constable and Co.; London: Hurst, Robinson, and Co., →OCLC:",
          "text": "Her presence was in some measure a restraint on the worthy divine, whose prolusion lasted the longer […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "An introductory essay."
      ],
      "id": "en-prolusion-en-noun-MxVhoAQ2",
      "links": [
        [
          "introductory",
          "introductory"
        ],
        [
          "essay",
          "essay"
        ]
      ]
    }
  ],
  "word": "prolusion"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English terms derived from Latin",
    "English undefined derivations",
    "Pages with 1 entry",
    "Pages with entries",
    "Requests for attention in Latin etymologies"
  ],
  "derived": [
    {
      "word": "prolusory"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "-"
      },
      "expansion": "Latin",
      "name": "uder"
    },
    {
      "args": {},
      "expansion": "",
      "name": "lena"
    }
  ],
  "etymology_text": "Latin prolusio, from proludere (“to prelude”).",
  "forms": [
    {
      "form": "prolusions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "prolusion (plural prolusions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1854, Arthur Pendennis [pseudonym; William Makepeace Thackeray], The Newcomes: Memoirs of a Most Respectable Family, volume (please specify |volume=I or II), London: Bradbury and Evans, […], →OCLC:",
          "text": "Domestic prolusions.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A trial before the principal performance; a prelude."
      ],
      "links": [
        [
          "trial",
          "trial"
        ],
        [
          "principal",
          "principal"
        ],
        [
          "performance",
          "performance"
        ],
        [
          "prelude",
          "prelude"
        ]
      ]
    },
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1822, [Walter Scott], Peveril of the Peak. […], volume (please specify |volume=I to IV), Edinburgh: […] Archibald Constable and Co.; London: Hurst, Robinson, and Co., →OCLC:",
          "text": "Her presence was in some measure a restraint on the worthy divine, whose prolusion lasted the longer […]",
          "type": "quote"
        }
      ],
      "glosses": [
        "An introductory essay."
      ],
      "links": [
        [
          "introductory",
          "introductory"
        ],
        [
          "essay",
          "essay"
        ]
      ]
    }
  ],
  "word": "prolusion"
}