"trolley jack" meaning in English

{
  "forms": [
    {
      "form": "trolley jacks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "trolley jack (plural trolley jacks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Tools",
          "orig": "en:Tools",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A hydraulic jack (lifting device) mounted on wheels, and equipped with a long handle which also acts as a pump handle, which can be pulled to wherever it is needed."
      ],
      "id": "en-trolley_jack-en-noun-~ghtF4Mf",
      "links": [
        [
          "hydraulic",
          "hydraulic"
        ],
        [
          "jack",
          "jack"
        ],
        [
          "wheel",
          "wheel"
        ],
        [
          "handle",
          "handle"
        ],
        [
          "pump",
          "pump"
        ],
        [
          "pull",
          "pull"
        ]
      ]
    }
  ],
  "word": "trolley jack"
}

{
  "forms": [
    {
      "form": "trolley jacks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "trolley jack (plural trolley jacks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Tools"
      ],
      "glosses": [
        "A hydraulic jack (lifting device) mounted on wheels, and equipped with a long handle which also acts as a pump handle, which can be pulled to wherever it is needed."
      ],
      "links": [
        [
          "hydraulic",
          "hydraulic"
        ],
        [
          "jack",
          "jack"
        ],
        [
          "wheel",
          "wheel"
        ],
        [
          "handle",
          "handle"
        ],
        [
          "pump",
          "pump"
        ],
        [
          "pull",
          "pull"
        ]
      ]
    }
  ],
  "word": "trolley jack"
}