"absolutely flat" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "absolutely flat (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of regular (“a von Neumann regular”)"
      ],
      "id": "en-absolutely_flat-en-adj-H0Q951R6",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "regular",
          "regular#English"
        ]
      ],
      "raw_glosses": [
        "(mathematics) Synonym of regular (“a von Neumann regular”)"
      ],
      "synonyms": [
        {
          "extra": "a von Neumann regular",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "regular"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "absolutely flat"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "absolutely flat (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 multiword terms",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Mathematics"
      ],
      "glosses": [
        "Synonym of regular (“a von Neumann regular”)"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "regular",
          "regular#English"
        ]
      ],
      "raw_glosses": [
        "(mathematics) Synonym of regular (“a von Neumann regular”)"
      ],
      "synonyms": [
        {
          "extra": "a von Neumann regular",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "regular"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "absolutely flat"
}