"railfanning" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "railfan",
        "3": "ing"
      },
      "expansion": "railfan + -ing",
      "name": "suffix"
    }
  ],
  "etymology_text": "From railfan + -ing.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "railfanning (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -ing",
          "parents": [],
          "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": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The activities of railfans."
      ],
      "id": "en-railfanning-en-noun-uD-qM5FU",
      "links": [
        [
          "railfan",
          "railfan"
        ]
      ],
      "raw_glosses": [
        "(US) The activities of railfans."
      ],
      "synonyms": [
        {
          "word": "train spotting"
        }
      ],
      "tags": [
        "US",
        "uncountable"
      ]
    }
  ],
  "word": "railfanning"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "railfan",
        "3": "ing"
      },
      "expansion": "railfan + -ing",
      "name": "suffix"
    }
  ],
  "etymology_text": "From railfan + -ing.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "railfanning (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -ing",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Rail transportation"
      ],
      "glosses": [
        "The activities of railfans."
      ],
      "links": [
        [
          "railfan",
          "railfan"
        ]
      ],
      "raw_glosses": [
        "(US) The activities of railfans."
      ],
      "tags": [
        "US",
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "train spotting"
    }
  ],
  "word": "railfanning"
}