"plain line" meaning in English

{
  "antonyms": [
    {
      "sense": "antonym(s) of “railway track without points”",
      "word": "pointwork"
    }
  ],
  "forms": [
    {
      "form": "plain lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "plain line (plural plain lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "59 41",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "64 36",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "67 33",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "a stretch of railway track that does not have any junctions, crossovers or points on it."
      ],
      "id": "en-plain_line-en-noun-CeiRLZss",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "crossover",
          "crossover"
        ],
        [
          "points",
          "points"
        ]
      ],
      "raw_glosses": [
        "(rail transport) a stretch of railway track that does not have any junctions, crossovers or points on it."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "plain line"
}

{
  "forms": [
    {
      "form": "plain lines",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "plain lining",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "plain lined",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "plain lined",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "plain line (third-person singular simple present plain lines, present participle plain lining, simple past and past participle plain lined)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "to remove points and crossovers from a stretch of track."
      ],
      "id": "en-plain_line-en-verb-srzBqdpZ",
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(rail transport) to remove points and crossovers from a stretch of track."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "plain line"
}

{
  "antonyms": [
    {
      "sense": "antonym(s) of “railway track without points”",
      "word": "pointwork"
    }
  ],
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English verbs",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "plain lines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "plain line (plural plain lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Rail transportation"
      ],
      "glosses": [
        "a stretch of railway track that does not have any junctions, crossovers or points on it."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "railway",
          "railway"
        ],
        [
          "crossover",
          "crossover"
        ],
        [
          "points",
          "points"
        ]
      ],
      "raw_glosses": [
        "(rail transport) a stretch of railway track that does not have any junctions, crossovers or points on it."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "plain line"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English verbs",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "plain lines",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "plain lining",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "plain lined",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "plain lined",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "plain line (third-person singular simple present plain lines, present participle plain lining, simple past and past participle plain lined)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "en:Rail transportation"
      ],
      "glosses": [
        "to remove points and crossovers from a stretch of track."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(rail transport) to remove points and crossovers from a stretch of track."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "plain line"
}