"trolley pole" meaning in English

{
  "etymology_text": "A trolley wheel (a wheel that trolls along a wire) at the end of a pole.",
  "forms": [
    {
      "form": "trolley poles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "trolley pole (plural trolley poles)",
      "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": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Transport",
          "orig": "en:Transport",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A pole of wood or metal, used to transfer electricity from an overhead wire to power a tram, streetcar or trolley bus."
      ],
      "id": "en-trolley_pole-en-noun-hWiLM4xa",
      "links": [
        [
          "electricity",
          "electricity"
        ],
        [
          "overhead",
          "overhead"
        ],
        [
          "tram",
          "tram"
        ],
        [
          "streetcar",
          "streetcar"
        ],
        [
          "trolley bus",
          "trolley bus"
        ]
      ],
      "related": [
        {
          "word": "bow collector"
        },
        {
          "word": "pantograph"
        }
      ]
    }
  ],
  "word": "trolley pole"
}

{
  "etymology_text": "A trolley wheel (a wheel that trolls along a wire) at the end of a pole.",
  "forms": [
    {
      "form": "trolley poles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "trolley pole (plural trolley poles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "bow collector"
    },
    {
      "word": "pantograph"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Rail transportation",
        "en:Transport"
      ],
      "glosses": [
        "A pole of wood or metal, used to transfer electricity from an overhead wire to power a tram, streetcar or trolley bus."
      ],
      "links": [
        [
          "electricity",
          "electricity"
        ],
        [
          "overhead",
          "overhead"
        ],
        [
          "tram",
          "tram"
        ],
        [
          "streetcar",
          "streetcar"
        ],
        [
          "trolley bus",
          "trolley bus"
        ]
      ]
    }
  ],
  "word": "trolley pole"
}