"before one knows it" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "before one knows it",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "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 positive polarity items",
          "parents": [
            "Positive polarity items",
            "Terms by semantic function"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with collocations",
          "parents": [
            "Terms with collocations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "before you know it",
          "type": "example"
        }
      ],
      "glosses": [
        "rapidly (and sometimes unexpectedly)"
      ],
      "id": "en-before_one_knows_it-en-phrase-S8zfxpl9",
      "links": [
        [
          "rapidly",
          "rapidly"
        ],
        [
          "unexpectedly",
          "unexpectedly"
        ]
      ],
      "related": [
        {
          "word": "before you can say knife"
        }
      ]
    }
  ],
  "word": "before one knows it"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "before one knows it",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "before you can say knife"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English phrases",
        "English positive polarity items",
        "English terms with collocations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "before you know it",
          "type": "example"
        }
      ],
      "glosses": [
        "rapidly (and sometimes unexpectedly)"
      ],
      "links": [
        [
          "rapidly",
          "rapidly"
        ],
        [
          "unexpectedly",
          "unexpectedly"
        ]
      ]
    }
  ],
  "word": "before one knows it"
}