"May–December" meaning in English

{
  "etymology_text": "From the lyrics to the Kurt Weill/Maxwell Anderson song \"September Song\", about such a relationship, which includes the line \"It's a long, long time from May to December\".",
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "May–December"
      },
      "expansion": "May–December (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Love",
          "orig": "en:Love",
          "parents": [
            "Emotions",
            "Virtue",
            "Mind",
            "Ethics",
            "Human",
            "Philosophy",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "May–December romance"
        },
        {
          "word": "May–December marriage"
        }
      ],
      "examples": [
        {
          "ref": "2013, Katherine Arcement, “Diary”, in London Review of Books, volume 35, number 5",
          "text": "Whatever fantasy you can’t act out in real life can be fulfilled in fan fiction. May-December relationships are very popular, as are boys transforming into girls.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Pertaining to a relationship in which one person is much older than the other."
      ],
      "id": "en-May–December-en-adj-BfelS-yJ",
      "links": [
        [
          "relationship",
          "relationship"
        ],
        [
          "older",
          "older"
        ]
      ],
      "related": [
        {
          "word": "autumn romance"
        },
        {
          "word": "December bride"
        }
      ],
      "synonyms": [
        {
          "word": "May–September"
        },
        {
          "word": "May-to-December"
        },
        {
          "word": "May and December"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "wikipedia": [
        "September Song"
      ]
    }
  ],
  "word": "May–December"
}

{
  "derived": [
    {
      "word": "May–December romance"
    },
    {
      "word": "May–December marriage"
    }
  ],
  "etymology_text": "From the lyrics to the Kurt Weill/Maxwell Anderson song \"September Song\", about such a relationship, which includes the line \"It's a long, long time from May to December\".",
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "May–December"
      },
      "expansion": "May–December (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "autumn romance"
    },
    {
      "word": "December bride"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English terms with quotations",
        "English terms with redundant head parameter",
        "English uncomparable adjectives",
        "en:Love"
      ],
      "examples": [
        {
          "ref": "2013, Katherine Arcement, “Diary”, in London Review of Books, volume 35, number 5",
          "text": "Whatever fantasy you can’t act out in real life can be fulfilled in fan fiction. May-December relationships are very popular, as are boys transforming into girls.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Pertaining to a relationship in which one person is much older than the other."
      ],
      "links": [
        [
          "relationship",
          "relationship"
        ],
        [
          "older",
          "older"
        ]
      ],
      "tags": [
        "not-comparable"
      ],
      "wikipedia": [
        "September Song"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "May–September"
    },
    {
      "word": "May-to-December"
    },
    {
      "word": "May and December"
    }
  ],
  "word": "May–December"
}