"crewless" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "crew",
        "3": "less"
      },
      "expansion": "crew + -less",
      "name": "suffix"
    }
  ],
  "etymology_text": "crew + -less",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "crewless (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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 -less",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1961 February, “Talking of Trains: Automated trains in New York”, in Trains Illustrated, page 78",
          "text": "The short but extremely busy subway shuttle service on the northerly track between New York's Times Square and Grand Central Station will soon be provided by crewless three car trains.",
          "type": "quotation"
        },
        {
          "ref": "1964 November, “Automatic helper locomotive control on the Louisville & Nashville RR, USA”, in Modern Railways, page 354",
          "text": "A device for the automatic control of crewless helper locomotives cut into the make-up of heavy freight trains has been perfected by the Louisville & Nashville RR in conjunction with the General Railway Signalling Co.",
          "type": "quotation"
        },
        {
          "ref": "2013 December 26, Dave Rudd, “No hands on deck: Dawn of the crewless ship”, in The Financial Times",
          "text": "No hands on deck: Dawn of the crewless ship",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Without a crew; unmanned"
      ],
      "id": "en-crewless-en-adj-JKzjS-Pa",
      "links": [
        [
          "crew",
          "crew"
        ],
        [
          "unmanned",
          "unmanned"
        ]
      ],
      "synonyms": [
        {
          "word": "uncrewed"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "crewless"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "crew",
        "3": "less"
      },
      "expansion": "crew + -less",
      "name": "suffix"
    }
  ],
  "etymology_text": "crew + -less",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "crewless (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -less",
        "English terms with quotations",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "ref": "1961 February, “Talking of Trains: Automated trains in New York”, in Trains Illustrated, page 78",
          "text": "The short but extremely busy subway shuttle service on the northerly track between New York's Times Square and Grand Central Station will soon be provided by crewless three car trains.",
          "type": "quotation"
        },
        {
          "ref": "1964 November, “Automatic helper locomotive control on the Louisville & Nashville RR, USA”, in Modern Railways, page 354",
          "text": "A device for the automatic control of crewless helper locomotives cut into the make-up of heavy freight trains has been perfected by the Louisville & Nashville RR in conjunction with the General Railway Signalling Co.",
          "type": "quotation"
        },
        {
          "ref": "2013 December 26, Dave Rudd, “No hands on deck: Dawn of the crewless ship”, in The Financial Times",
          "text": "No hands on deck: Dawn of the crewless ship",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Without a crew; unmanned"
      ],
      "links": [
        [
          "crew",
          "crew"
        ],
        [
          "unmanned",
          "unmanned"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "uncrewed"
    }
  ],
  "word": "crewless"
}