"prooemion" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "προοίμιον"
      },
      "expansion": "Ancient Greek προοίμιον (prooímion)",
      "name": "der"
    },
    {
      "args": {
        "1": "en",
        "2": "proem"
      },
      "expansion": "Doublet of proem",
      "name": "doublet"
    }
  ],
  "etymology_text": "From Ancient Greek προοίμιον (prooímion). Doublet of proem.",
  "forms": [
    {
      "form": "prooemia",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "prooemia"
      },
      "expansion": "prooemion (plural prooemia)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "c. 1862, Alfred Lord Tennyson, \"Lucretius\"\nForgetful how my rich prooemion makes / Thy glory fly along the Italian field"
        }
      ],
      "glosses": [
        "A preface, an introduction."
      ],
      "id": "en-prooemion-en-noun-CX14ru~b",
      "links": [
        [
          "preface",
          "preface"
        ],
        [
          "introduction",
          "introduction"
        ]
      ]
    }
  ],
  "word": "prooemion"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "προοίμιον"
      },
      "expansion": "Ancient Greek προοίμιον (prooímion)",
      "name": "der"
    },
    {
      "args": {
        "1": "en",
        "2": "proem"
      },
      "expansion": "Doublet of proem",
      "name": "doublet"
    }
  ],
  "etymology_text": "From Ancient Greek προοίμιον (prooímion). Doublet of proem.",
  "forms": [
    {
      "form": "prooemia",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "prooemia"
      },
      "expansion": "prooemion (plural prooemia)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English doublets",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English terms derived from Ancient Greek"
      ],
      "examples": [
        {
          "text": "c. 1862, Alfred Lord Tennyson, \"Lucretius\"\nForgetful how my rich prooemion makes / Thy glory fly along the Italian field"
        }
      ],
      "glosses": [
        "A preface, an introduction."
      ],
      "links": [
        [
          "preface",
          "preface"
        ],
        [
          "introduction",
          "introduction"
        ]
      ]
    }
  ],
  "word": "prooemion"
}