"on the flat" meaning in English

{
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "On level ground."
      ],
      "id": "en-on_the_flat-en-prep_phrase-CCUCzxwg",
      "links": [
        [
          "level",
          "level"
        ]
      ],
      "raw_glosses": [
        "(UK) On level ground."
      ],
      "tags": [
        "UK"
      ]
    },
    {
      "categories": [
        {
          "_dis": "17 83",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 96",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 96",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              147,
              158
            ]
          ],
          "ref": "1959 November, “L.T. and E.R. developments in East London”, in Trains Illustrated, page 529:",
          "text": "Another connection to be removed in September was that from the North London Line to the Tilbury route at Bromley, which crossed the District Line on the flat.",
          "type": "quote"
        },
        {
          "bold_text_offsets": [
            [
              194,
              205
            ]
          ],
          "ref": "2025 October 1, Philip Haigh, “Winners and losers in the new ECML timetable”, in RAIL, number 1045, page 22:",
          "text": "Aside from services running along the East Coast Main Line, the documents include East Midlands Railway's services from Matlock and Derby to Lincoln and Cleethorpes, because they cross the ECML on the flat at Newark. In the busiest weekday hour, 21 trains cross at Newark.",
          "type": "quote"
        }
      ],
      "glosses": [
        "On the same level, at grade."
      ],
      "id": "en-on_the_flat-en-prep_phrase-WOJR6~dF",
      "links": [
        [
          "at grade",
          "at grade"
        ]
      ],
      "related": [
        {
          "_dis1": "11 89",
          "word": "flat crossing"
        }
      ]
    }
  ],
  "word": "on the flat"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English prepositional phrases",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "related": [
    {
      "word": "flat crossing"
    }
  ],
  "senses": [
    {
      "categories": [
        "British English"
      ],
      "glosses": [
        "On level ground."
      ],
      "links": [
        [
          "level",
          "level"
        ]
      ],
      "raw_glosses": [
        "(UK) On level ground."
      ],
      "tags": [
        "UK"
      ]
    },
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              147,
              158
            ]
          ],
          "ref": "1959 November, “L.T. and E.R. developments in East London”, in Trains Illustrated, page 529:",
          "text": "Another connection to be removed in September was that from the North London Line to the Tilbury route at Bromley, which crossed the District Line on the flat.",
          "type": "quote"
        },
        {
          "bold_text_offsets": [
            [
              194,
              205
            ]
          ],
          "ref": "2025 October 1, Philip Haigh, “Winners and losers in the new ECML timetable”, in RAIL, number 1045, page 22:",
          "text": "Aside from services running along the East Coast Main Line, the documents include East Midlands Railway's services from Matlock and Derby to Lincoln and Cleethorpes, because they cross the ECML on the flat at Newark. In the busiest weekday hour, 21 trains cross at Newark.",
          "type": "quote"
        }
      ],
      "glosses": [
        "On the same level, at grade."
      ],
      "links": [
        [
          "at grade",
          "at grade"
        ]
      ]
    }
  ],
  "word": "on the flat"
}