"pillionist" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "pillion",
        "3": "ist"
      },
      "expansion": "pillion + -ist",
      "name": "suffix"
    }
  ],
  "etymology_text": "From pillion + -ist.",
  "forms": [
    {
      "form": "pillionists",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pillionist (plural pillionists)",
      "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": "English terms suffixed with -ist",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A passenger who rides on the pillion of a motorcycle."
      ],
      "id": "en-pillionist-en-noun-rCwsRLeH",
      "links": [
        [
          "passenger",
          "passenger"
        ],
        [
          "pillion",
          "pillion"
        ],
        [
          "motorcycle",
          "motorcycle"
        ]
      ],
      "raw_glosses": [
        "(rare, dated) A passenger who rides on the pillion of a motorcycle."
      ],
      "tags": [
        "dated",
        "rare"
      ]
    }
  ],
  "word": "pillionist"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "pillion",
        "3": "ist"
      },
      "expansion": "pillion + -ist",
      "name": "suffix"
    }
  ],
  "etymology_text": "From pillion + -ist.",
  "forms": [
    {
      "form": "pillionists",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pillionist (plural pillionists)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -ist",
        "English terms with rare senses",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A passenger who rides on the pillion of a motorcycle."
      ],
      "links": [
        [
          "passenger",
          "passenger"
        ],
        [
          "pillion",
          "pillion"
        ],
        [
          "motorcycle",
          "motorcycle"
        ]
      ],
      "raw_glosses": [
        "(rare, dated) A passenger who rides on the pillion of a motorcycle."
      ],
      "tags": [
        "dated",
        "rare"
      ]
    }
  ],
  "word": "pillionist"
}