"cas'" meaning in English

{
  "forms": [
    {
      "form": "more cas'",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most cas'",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cas' (comparative more cas', superlative most cas')",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Australian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Casual."
      ],
      "id": "en-cas'-en-adj-HUhagI8Y",
      "links": [
        [
          "Casual",
          "casual"
        ]
      ],
      "raw_glosses": [
        "(Australia, US, colloquial) Casual."
      ],
      "tags": [
        "Australia",
        "US",
        "colloquial"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/kæʒ/"
    }
  ],
  "word": "cas'"
}

{
  "forms": [
    {
      "form": "more cas'",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most cas'",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cas' (comparative more cas', superlative most cas')",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "American English",
        "Australian English",
        "English 1-syllable words",
        "English adjectives",
        "English colloquialisms",
        "English contractions",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English terms with IPA pronunciation",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "Casual."
      ],
      "links": [
        [
          "Casual",
          "casual"
        ]
      ],
      "raw_glosses": [
        "(Australia, US, colloquial) Casual."
      ],
      "tags": [
        "Australia",
        "US",
        "colloquial"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/kæʒ/"
    }
  ],
  "word": "cas'"
}