"clean slate" meaning in English

{
  "forms": [
    {
      "form": "clean slates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "clean slate (plural clean slates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nautical",
          "orig": "en:Nautical",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "_dis1": "100 0",
          "word": "start with a clean slate"
        }
      ],
      "glosses": [
        "A slate on which the courses steered by a ship (and distances run) were recorded, but have been wiped clean after being entered in the log at the end of a watch."
      ],
      "id": "en-clean_slate-en-noun-xcm2YjCa",
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "slate",
          "slate"
        ],
        [
          "course",
          "course"
        ],
        [
          "steered",
          "steered"
        ],
        [
          "ship",
          "ship"
        ],
        [
          "distance",
          "distance"
        ],
        [
          "recorded",
          "recorded"
        ],
        [
          "wiped",
          "wiped"
        ],
        [
          "log",
          "log"
        ],
        [
          "watch",
          "watch"
        ]
      ],
      "raw_glosses": [
        "(nautical) A slate on which the courses steered by a ship (and distances run) were recorded, but have been wiped clean after being entered in the log at the end of a watch."
      ],
      "related": [
        {
          "_dis1": "100 0",
          "word": "wipe the slate clean"
        },
        {
          "_dis1": "100 0",
          "word": "blank slate"
        }
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    },
    {
      "categories": [
        {
          "_dis": "24 76",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A fresh start."
      ],
      "id": "en-clean_slate-en-noun-6922nR7j",
      "links": [
        [
          "fresh start",
          "fresh start"
        ]
      ],
      "raw_glosses": [
        "(by extension) A fresh start."
      ],
      "tags": [
        "broadly"
      ]
    }
  ],
  "word": "clean slate"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "derived": [
    {
      "word": "start with a clean slate"
    }
  ],
  "forms": [
    {
      "form": "clean slates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "clean slate (plural clean slates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "wipe the slate clean"
    },
    {
      "word": "blank slate"
    }
  ],
  "senses": [
    {
      "categories": [
        "en:Nautical"
      ],
      "glosses": [
        "A slate on which the courses steered by a ship (and distances run) were recorded, but have been wiped clean after being entered in the log at the end of a watch."
      ],
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "slate",
          "slate"
        ],
        [
          "course",
          "course"
        ],
        [
          "steered",
          "steered"
        ],
        [
          "ship",
          "ship"
        ],
        [
          "distance",
          "distance"
        ],
        [
          "recorded",
          "recorded"
        ],
        [
          "wiped",
          "wiped"
        ],
        [
          "log",
          "log"
        ],
        [
          "watch",
          "watch"
        ]
      ],
      "raw_glosses": [
        "(nautical) A slate on which the courses steered by a ship (and distances run) were recorded, but have been wiped clean after being entered in the log at the end of a watch."
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    },
    {
      "glosses": [
        "A fresh start."
      ],
      "links": [
        [
          "fresh start",
          "fresh start"
        ]
      ],
      "raw_glosses": [
        "(by extension) A fresh start."
      ],
      "tags": [
        "broadly"
      ]
    }
  ],
  "word": "clean slate"
}