"vitriolous" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "vitriol",
        "3": "ous"
      },
      "expansion": "vitriol + -ous",
      "name": "suffix"
    }
  ],
  "etymology_text": "vitriol + -ous",
  "forms": [
    {
      "form": "more vitriolous",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most vitriolous",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vitriolous (comparative more vitriolous, superlative most vitriolous)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "vitriolic"
        }
      ],
      "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 -ous",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Obsolete form of vitriolic."
      ],
      "id": "en-vitriolous-en-adj-1nR6QuBV",
      "links": [
        [
          "vitriolic",
          "vitriolic#English"
        ]
      ],
      "tags": [
        "alt-of",
        "obsolete"
      ]
    }
  ],
  "word": "vitriolous"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "vitriol",
        "3": "ous"
      },
      "expansion": "vitriol + -ous",
      "name": "suffix"
    }
  ],
  "etymology_text": "vitriol + -ous",
  "forms": [
    {
      "form": "more vitriolous",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most vitriolous",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vitriolous (comparative more vitriolous, superlative most vitriolous)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "vitriolic"
        }
      ],
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English obsolete forms",
        "English terms suffixed with -ous"
      ],
      "glosses": [
        "Obsolete form of vitriolic."
      ],
      "links": [
        [
          "vitriolic",
          "vitriolic#English"
        ]
      ],
      "tags": [
        "alt-of",
        "obsolete"
      ]
    }
  ],
  "word": "vitriolous"
}