"erosional" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "erosion",
        "3": "al"
      },
      "expansion": "erosion + -al",
      "name": "suffix"
    }
  ],
  "etymology_text": "From erosion + -al.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "erosional (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 -al",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "erosional unconformity"
        }
      ],
      "examples": [
        {
          "ref": "2004, Richard Fortey, The Earth, Folio Society, published 2011, page 58",
          "text": "When the island finally reaches close to sea-level there will no longer be sufficient elevation to produce the rainfall that drives the erosional machine.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Pertaining to erosion."
      ],
      "id": "en-erosional-en-adj-qoOI4njw",
      "links": [
        [
          "erosion",
          "erosion"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "erosional"
}

{
  "derived": [
    {
      "word": "erosional unconformity"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "erosion",
        "3": "al"
      },
      "expansion": "erosion + -al",
      "name": "suffix"
    }
  ],
  "etymology_text": "From erosion + -al.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "erosional (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 -al",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2004, Richard Fortey, The Earth, Folio Society, published 2011, page 58",
          "text": "When the island finally reaches close to sea-level there will no longer be sufficient elevation to produce the rainfall that drives the erosional machine.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Pertaining to erosion."
      ],
      "links": [
        [
          "erosion",
          "erosion"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "erosional"
}