"千鈞一髪" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "四字熟語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 成句",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "危険な状況なこと。一髪千鈞。一髪千鈞を引く。"
      ],
      "id": "ja-千鈞一髪-ja-phrase-Blv9sl~F"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "千鈞一髪"
}

{
  "categories": [
    "四字熟語",
    "日本語",
    "日本語 成句"
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "危険な状況なこと。一髪千鈞。一髪千鈞を引く。"
      ]
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "千鈞一髪"
}