"( )" meaning in Burmese

{
  "head_templates": [
    {
      "args": {
        "1": "my",
        "2": "punctuation mark",
        "cat2": "matched pairs",
        "tr": "-"
      },
      "expansion": "( )",
      "name": "head"
    }
  ],
  "lang": "Burmese",
  "lang_code": "my",
  "pos": "punct",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Burmese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Burmese matched pairs",
          "parents": [
            "Matched pairs",
            "Symbols",
            "Letters, symbols, and punctuation",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Burmese punctuation marks",
          "parents": [
            "Punctuation marks",
            "Letters, symbols, and punctuation",
            "Symbols",
            "Orthography",
            "Writing",
            "Human behaviour",
            "Language",
            "Human",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "ရက်ပေါင်း (၁၀၀) အလွန်\nrakpaung: (100) a.lwan\n100 days later",
          "type": "example"
        }
      ],
      "glosses": [
        "sometimes used to enclose numbers to distinguish from letters"
      ],
      "id": "en-(_)-my-punct-hbtDcVTG",
      "raw_tags": [
        "punctuation"
      ]
    }
  ],
  "word": "( )"
}

{
  "head_templates": [
    {
      "args": {
        "1": "my",
        "2": "punctuation mark",
        "cat2": "matched pairs",
        "tr": "-"
      },
      "expansion": "( )",
      "name": "head"
    }
  ],
  "lang": "Burmese",
  "lang_code": "my",
  "pos": "punct",
  "senses": [
    {
      "categories": [
        "Burmese entries with incorrect language header",
        "Burmese lemmas",
        "Burmese matched pairs",
        "Burmese punctuation marks",
        "Burmese terms with usage examples"
      ],
      "examples": [
        {
          "text": "ရက်ပေါင်း (၁၀၀) အလွန်\nrakpaung: (100) a.lwan\n100 days later",
          "type": "example"
        }
      ],
      "glosses": [
        "sometimes used to enclose numbers to distinguish from letters"
      ],
      "raw_tags": [
        "punctuation"
      ]
    }
  ],
  "word": "( )"
}