"pony engine" meaning in English

{
  "forms": [
    {
      "form": "pony engines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pony engine (plural pony engines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "A small locomotive used for shunting wagons, etc."
      ],
      "id": "en-pony_engine-en-noun-en:shunter_type_of_locomotive",
      "links": [
        [
          "locomotive",
          "locomotive"
        ],
        [
          "shunt",
          "shunt"
        ],
        [
          "wagon",
          "wagon"
        ]
      ],
      "senseid": [
        "en:shunter type of locomotive"
      ],
      "synonyms": [
        {
          "word": "shunter"
        },
        {
          "word": "shunting engine"
        },
        {
          "word": "switcher"
        }
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Canadian English",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "41 59",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A small gasoline engine serving as an auxiliary to a diesel engine (mainly in older designs from the 1930s to 1950s), providing heat to warm it up and, when engaged with a clutch, providing cranking to start it up."
      ],
      "id": "en-pony_engine-en-noun-en:small_auxiliary_engine_to_warm_and_start_a_larger_engine",
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "diesel engine",
          "diesel engine"
        ]
      ],
      "raw_glosses": [
        "(Canada, US, dated) A small gasoline engine serving as an auxiliary to a diesel engine (mainly in older designs from the 1930s to 1950s), providing heat to warm it up and, when engaged with a clutch, providing cranking to start it up."
      ],
      "senseid": [
        "en:small auxiliary engine to warm and start a larger engine"
      ],
      "synonyms": [
        {
          "word": "pony motor"
        }
      ],
      "tags": [
        "Canada",
        "US",
        "dated"
      ]
    }
  ],
  "word": "pony engine"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "pony engines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pony engine (plural pony engines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "A small locomotive used for shunting wagons, etc."
      ],
      "links": [
        [
          "locomotive",
          "locomotive"
        ],
        [
          "shunt",
          "shunt"
        ],
        [
          "wagon",
          "wagon"
        ]
      ],
      "senseid": [
        "en:shunter type of locomotive"
      ],
      "synonyms": [
        {
          "word": "shunter"
        },
        {
          "word": "shunting engine"
        },
        {
          "word": "switcher"
        }
      ]
    },
    {
      "categories": [
        "American English",
        "Canadian English",
        "English dated terms"
      ],
      "glosses": [
        "A small gasoline engine serving as an auxiliary to a diesel engine (mainly in older designs from the 1930s to 1950s), providing heat to warm it up and, when engaged with a clutch, providing cranking to start it up."
      ],
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "diesel engine",
          "diesel engine"
        ]
      ],
      "raw_glosses": [
        "(Canada, US, dated) A small gasoline engine serving as an auxiliary to a diesel engine (mainly in older designs from the 1930s to 1950s), providing heat to warm it up and, when engaged with a clutch, providing cranking to start it up."
      ],
      "senseid": [
        "en:small auxiliary engine to warm and start a larger engine"
      ],
      "synonyms": [
        {
          "word": "pony motor"
        }
      ],
      "tags": [
        "Canada",
        "US",
        "dated"
      ]
    }
  ],
  "word": "pony engine"
}