"good night, sweet prince" meaning in English

{
  "etymology_text": "From Shakespeare's Hamlet (act V scene ii), in which Horatio utters the line to his dying friend Hamlet.",
  "head_templates": [
    {
      "args": {
        "head": "good night, sweet prince"
      },
      "expansion": "good night, sweet prince",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "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": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Death",
          "orig": "en:Death",
          "parents": [
            "Body",
            "Life",
            "Human",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "William Shakespeare",
          "orig": "en:William Shakespeare",
          "parents": [
            "Authors",
            "Individuals",
            "Literature",
            "People",
            "Culture",
            "Entertainment",
            "Writing",
            "Human",
            "Society",
            "Human behaviour",
            "Language",
            "All topics",
            "Communication",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Implies that somebody died."
      ],
      "id": "en-good_night,_sweet_prince-en-intj-F30y-5bg"
    }
  ],
  "word": "good night, sweet prince"
}

{
  "etymology_text": "From Shakespeare's Hamlet (act V scene ii), in which Horatio utters the line to his dying friend Hamlet.",
  "head_templates": [
    {
      "args": {
        "head": "good night, sweet prince"
      },
      "expansion": "good night, sweet prince",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English terms with non-redundant non-automated sortkeys",
        "en:Death",
        "en:William Shakespeare"
      ],
      "glosses": [
        "Implies that somebody died."
      ]
    }
  ],
  "word": "good night, sweet prince"
}