"signatureless" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "signature",
        "3": "less"
      },
      "expansion": "signature + -less",
      "name": "suffix"
    }
  ],
  "etymology_text": "From signature + -less.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "signatureless (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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2015 July 6, “How to Establish and Follow up a Large Prospective Cohort Study in the 21st Century - Lessons from UK COSMOS”, in PLOS ONE, →DOI:",
          "text": "For all subsequent phases, we used a fully web-based recruitment and data collection process comprising signatureless electronic consent (e-consent) form, registration form and questionnaire (Table 1).",
          "type": "quote"
        }
      ],
      "glosses": [
        "Without a signature."
      ],
      "id": "en-signatureless-en-adj-Kzv7GT8O",
      "links": [
        [
          "signature",
          "signature"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "signatureless"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "signature",
        "3": "less"
      },
      "expansion": "signature + -less",
      "name": "suffix"
    }
  ],
  "etymology_text": "From signature + -less.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "signatureless (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",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2015 July 6, “How to Establish and Follow up a Large Prospective Cohort Study in the 21st Century - Lessons from UK COSMOS”, in PLOS ONE, →DOI:",
          "text": "For all subsequent phases, we used a fully web-based recruitment and data collection process comprising signatureless electronic consent (e-consent) form, registration form and questionnaire (Table 1).",
          "type": "quote"
        }
      ],
      "glosses": [
        "Without a signature."
      ],
      "links": [
        [
          "signature",
          "signature"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "signatureless"
}