"short a" meaning in English

{
  "antonyms": [
    {
      "sense": "antonym(s) of “GRASS vowel”",
      "word": "long a"
    },
    {
      "sense": "antonym(s) of “GRASS vowel”",
      "word": "broad a"
    }
  ],
  "forms": [
    {
      "form": "short a's",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "short a's"
      },
      "expansion": "short a (plural short a's)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "The vowel sound in the English words cat and rack, usually represented by /æ/ or /a/."
      ],
      "id": "en-short_a-en-noun-nZlASorg",
      "qualifier": "phonics",
      "raw_glosses": [
        "(phonics) The vowel sound in the English words cat and rack, usually represented by /æ/ or /a/."
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Linguistics",
          "orig": "en:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "33 67",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The vowel sound in the English words grass and castle when pronounced with a near-open front unrounded vowel (/æ/); associated with northern England accents."
      ],
      "id": "en-short_a-en-noun-e8V-V5hC",
      "links": [
        [
          "linguistics",
          "linguistics"
        ]
      ],
      "raw_glosses": [
        "(linguistics, especially UK) The vowel sound in the English words grass and castle when pronounced with a near-open front unrounded vowel (/æ/); associated with northern England accents."
      ],
      "synonyms": [
        {
          "_dis1": "36 64",
          "sense": "GRASS vowel",
          "word": "flat a"
        }
      ],
      "tags": [
        "UK",
        "especially"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "word": "short a"
}

{
  "antonyms": [
    {
      "sense": "antonym(s) of “GRASS vowel”",
      "word": "long a"
    },
    {
      "sense": "antonym(s) of “GRASS vowel”",
      "word": "broad a"
    }
  ],
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "short a's",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "short a's"
      },
      "expansion": "short a (plural short a's)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "The vowel sound in the English words cat and rack, usually represented by /æ/ or /a/."
      ],
      "qualifier": "phonics",
      "raw_glosses": [
        "(phonics) The vowel sound in the English words cat and rack, usually represented by /æ/ or /a/."
      ]
    },
    {
      "categories": [
        "British English",
        "en:Linguistics"
      ],
      "glosses": [
        "The vowel sound in the English words grass and castle when pronounced with a near-open front unrounded vowel (/æ/); associated with northern England accents."
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ]
      ],
      "raw_glosses": [
        "(linguistics, especially UK) The vowel sound in the English words grass and castle when pronounced with a near-open front unrounded vowel (/æ/); associated with northern England accents."
      ],
      "tags": [
        "UK",
        "especially"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "GRASS vowel",
      "word": "flat a"
    }
  ],
  "word": "short a"
}