"Trekker" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Trek",
        "3": "er"
      },
      "expansion": "Trek + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "(1970) Trek + -er.\nFrom Star Trek.",
  "forms": [
    {
      "form": "Trekkers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Trekker (plural Trekkers)",
      "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"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -er",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Fans (people)",
          "orig": "en:Fans (people)",
          "parents": [
            "Fandom",
            "People",
            "Culture",
            "Human",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Star Trek",
          "orig": "en:Star Trek",
          "parents": [
            "American fiction",
            "Film",
            "Science fiction",
            "Television",
            "Fiction",
            "United States",
            "Entertainment",
            "Mass media",
            "Speculative fiction",
            "Broadcasting",
            "Artistic works",
            "North America",
            "Culture",
            "Media",
            "Genres",
            "Telecommunications",
            "Art",
            "America",
            "Society",
            "Communication",
            "Technology",
            "Earth",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A fan of the TV science fiction series Star Trek."
      ],
      "id": "en-Trekker-en-noun-XQKKH-b2",
      "links": [
        [
          "fandom",
          "fandom"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "TV",
          "TV"
        ],
        [
          "science fiction",
          "science fiction"
        ],
        [
          "Star Trek",
          "Star Trek"
        ]
      ],
      "raw_glosses": [
        "(fandom slang) A fan of the TV science fiction series Star Trek."
      ],
      "synonyms": [
        {
          "word": "Trekfan"
        },
        {
          "word": "Trekkie"
        }
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "lifestyle"
      ],
      "wikipedia": [
        "en:Star Trek"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɹək.ə(ɹ)/",
      "tags": [
        "UK"
      ]
    },
    {
      "rhymes": "-ɛkə(ɹ)"
    }
  ],
  "word": "Trekker"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Trek",
        "3": "er"
      },
      "expansion": "Trek + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "(1970) Trek + -er.\nFrom Star Trek.",
  "forms": [
    {
      "form": "Trekkers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Trekker (plural Trekkers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English 2-syllable words",
        "English countable nouns",
        "English entries with incorrect language header",
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        "English fandom slang",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -er",
        "English terms with IPA pronunciation",
        "Rhymes:English/ɛkə(ɹ)",
        "Rhymes:English/ɛkə(ɹ)/2 syllables",
        "en:Fans (people)",
        "en:Star Trek"
      ],
      "glosses": [
        "A fan of the TV science fiction series Star Trek."
      ],
      "links": [
        [
          "fandom",
          "fandom"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "TV",
          "TV"
        ],
        [
          "science fiction",
          "science fiction"
        ],
        [
          "Star Trek",
          "Star Trek"
        ]
      ],
      "raw_glosses": [
        "(fandom slang) A fan of the TV science fiction series Star Trek."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "lifestyle"
      ],
      "wikipedia": [
        "en:Star Trek"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɹək.ə(ɹ)/",
      "tags": [
        "UK"
      ]
    },
    {
      "rhymes": "-ɛkə(ɹ)"
    }
  ],
  "synonyms": [
    {
      "word": "Trekfan"
    },
    {
      "word": "Trekkie"
    }
  ],
  "word": "Trekker"
}