"spleenless" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "spleneles"
      },
      "expansion": "Middle English spleneles",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "spleen",
        "3": "-less"
      },
      "expansion": "spleen + -less",
      "name": "af"
    }
  ],
  "etymology_text": "From Middle English spleneles, equivalent to spleen + -less.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "spleenless (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": "2009 January 28, Harvey Araton, “A Fierce Tackler Has Taken His Share of Hits”, in New York Times",
          "text": "Surgery left him spleenless, not spineless.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Lacking a spleen."
      ],
      "id": "en-spleenless-en-adj-k95e2009",
      "links": [
        [
          "spleen",
          "spleen"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "spleenless"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "spleneles"
      },
      "expansion": "Middle English spleneles",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "spleen",
        "3": "-less"
      },
      "expansion": "spleen + -less",
      "name": "af"
    }
  ],
  "etymology_text": "From Middle English spleneles, equivalent to spleen + -less.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "spleenless (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 derived from Middle English",
        "English terms inherited from Middle English",
        "English terms suffixed with -less",
        "English terms with quotations",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "ref": "2009 January 28, Harvey Araton, “A Fierce Tackler Has Taken His Share of Hits”, in New York Times",
          "text": "Surgery left him spleenless, not spineless.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Lacking a spleen."
      ],
      "links": [
        [
          "spleen",
          "spleen"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "spleenless"
}