"knock-knock" meaning in English

{
  "etymology_text": "Onomatopoeic.",
  "head_templates": [
    {
      "args": {},
      "expansion": "knock-knock",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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        {
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          "name": "Pages with 1 entry",
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        {
          "kind": "other",
          "name": "Terms with Hebrew translations",
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        {
          "kind": "other",
          "name": "Terms with Indonesian translations",
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        {
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          "name": "Terms with Italian translations",
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        {
          "kind": "other",
          "name": "Terms with Japanese translations",
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        },
        {
          "kind": "other",
          "name": "Terms with Korean translations",
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        },
        {
          "kind": "other",
          "name": "Terms with Mandarin translations",
          "parents": [],
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        },
        {
          "kind": "other",
          "name": "Terms with Polish translations",
          "parents": [],
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        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
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        },
        {
          "kind": "other",
          "name": "Terms with Spanish translations",
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        },
        {
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          "kind": "other",
          "name": "Terms with Vietnamese translations",
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        }
      ],
      "derived": [
        {
          "word": "knock-knock burglary"
        },
        {
          "word": "knock-knock joke"
        }
      ],
      "glosses": [
        "A verbal emulation of a knocking sound."
      ],
      "id": "en-knock-knock-en-intj-dPOgDpW~",
      "links": [
        [
          "verbal",
          "verbal"
        ],
        [
          "emulation",
          "emulation"
        ],
        [
          "knocking",
          "knocking"
        ],
        [
          "sound",
          "sound"
        ]
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "kēke, kàikài",
          "sense": "verbal knocking sound",
          "word": "磕磕"
        },
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "verbal knocking sound",
          "word": "klop klop"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "verbal knocking sound",
          "word": "kop kop"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "verbal knocking sound",
          "word": "toc-toc"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "verbal knocking sound",
          "word": "klopf klopf"
        },
        {
          "code": "he",
          "lang": "Hebrew",
          "roman": "tuk tuk",
          "sense": "verbal knocking sound",
          "word": "טוק טוק"
        },
        {
          "code": "id",
          "lang": "Indonesian",
          "sense": "verbal knocking sound",
          "word": "woi woi"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "verbal knocking sound",
          "word": "toc toc"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "nokkunokku",
          "sense": "verbal knocking sound",
          "word": "ノックノック"
        },
        {
          "code": "ko",
          "lang": "Korean",
          "roman": "ttokttok",
          "sense": "verbal knocking sound",
          "word": "똑똑"
        },
        {
          "code": "ko",
          "lang": "Korean",
          "roman": "nokeunokeu",
          "sense": "verbal knocking sound",
          "word": "노크노크"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "verbal knocking sound",
          "word": "puk-puk"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "tuk-túk",
          "sense": "verbal knocking sound",
          "word": "тук-ту́к"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "verbal knocking sound",
          "word": "toc-toc"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "verbal knocking sound",
          "word": "knack knack"
        },
        {
          "code": "tl",
          "lang": "Tagalog",
          "sense": "verbal knocking sound",
          "word": "tok-tok"
        },
        {
          "code": "tr",
          "lang": "Turkish",
          "sense": "verbal knocking sound",
          "word": "tak tak"
        },
        {
          "code": "vi",
          "lang": "Vietnamese",
          "sense": "verbal knocking sound",
          "word": "gõ gõ"
        }
      ]
    }
  ],
  "word": "knock-knock"
}

{
  "derived": [
    {
      "word": "knock-knock burglary"
    },
    {
      "word": "knock-knock joke"
    }
  ],
  "etymology_text": "Onomatopoeic.",
  "head_templates": [
    {
      "args": {},
      "expansion": "knock-knock",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English onomatopoeias",
        "Entries with translation boxes",
        "Japanese terms with redundant script codes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Dutch translations",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with German translations",
        "Terms with Hebrew translations",
        "Terms with Indonesian translations",
        "Terms with Italian translations",
        "Terms with Japanese translations",
        "Terms with Korean translations",
        "Terms with Mandarin translations",
        "Terms with Polish translations",
        "Terms with Russian translations",
        "Terms with Spanish translations",
        "Terms with Swedish translations",
        "Terms with Tagalog translations",
        "Terms with Turkish translations",
        "Terms with Vietnamese translations"
      ],
      "glosses": [
        "A verbal emulation of a knocking sound."
      ],
      "links": [
        [
          "verbal",
          "verbal"
        ],
        [
          "emulation",
          "emulation"
        ],
        [
          "knocking",
          "knocking"
        ],
        [
          "sound",
          "sound"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "kēke, kàikài",
      "sense": "verbal knocking sound",
      "word": "磕磕"
    },
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "verbal knocking sound",
      "word": "klop klop"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "verbal knocking sound",
      "word": "kop kop"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "verbal knocking sound",
      "word": "toc-toc"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "verbal knocking sound",
      "word": "klopf klopf"
    },
    {
      "code": "he",
      "lang": "Hebrew",
      "roman": "tuk tuk",
      "sense": "verbal knocking sound",
      "word": "טוק טוק"
    },
    {
      "code": "id",
      "lang": "Indonesian",
      "sense": "verbal knocking sound",
      "word": "woi woi"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "verbal knocking sound",
      "word": "toc toc"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "nokkunokku",
      "sense": "verbal knocking sound",
      "word": "ノックノック"
    },
    {
      "code": "ko",
      "lang": "Korean",
      "roman": "ttokttok",
      "sense": "verbal knocking sound",
      "word": "똑똑"
    },
    {
      "code": "ko",
      "lang": "Korean",
      "roman": "nokeunokeu",
      "sense": "verbal knocking sound",
      "word": "노크노크"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "verbal knocking sound",
      "word": "puk-puk"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "tuk-túk",
      "sense": "verbal knocking sound",
      "word": "тук-ту́к"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "verbal knocking sound",
      "word": "toc-toc"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "verbal knocking sound",
      "word": "knack knack"
    },
    {
      "code": "tl",
      "lang": "Tagalog",
      "sense": "verbal knocking sound",
      "word": "tok-tok"
    },
    {
      "code": "tr",
      "lang": "Turkish",
      "sense": "verbal knocking sound",
      "word": "tak tak"
    },
    {
      "code": "vi",
      "lang": "Vietnamese",
      "sense": "verbal knocking sound",
      "word": "gõ gõ"
    }
  ],
  "word": "knock-knock"
}