"sg" meaning in Turkish

{
  "head_templates": [
    {
      "args": {
        "1": "tr",
        "2": "phrase"
      },
      "expansion": "sg",
      "name": "head"
    }
  ],
  "lang": "Turkish",
  "lang_code": "tr",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "word": "siktir git"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Turkish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Turkish links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "tr",
          "name": "Internet",
          "orig": "tr:Internet",
          "parents": [
            "Computing",
            "Networking",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of siktir git."
      ],
      "id": "en-sg-tr-phrase-jGLSdjaK",
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "siktir git",
          "siktir git#Turkish"
        ]
      ],
      "raw_glosses": [
        "(Internet) Initialism of siktir git."
      ],
      "tags": [
        "Internet",
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "sg"
}

{
  "head_templates": [
    {
      "args": {
        "1": "tr",
        "2": "phrase"
      },
      "expansion": "sg",
      "name": "head"
    }
  ],
  "lang": "Turkish",
  "lang_code": "tr",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "word": "siktir git"
        }
      ],
      "categories": [
        "Turkish entries with incorrect language header",
        "Turkish initialisms",
        "Turkish lemmas",
        "Turkish links with redundant wikilinks",
        "Turkish phrases",
        "tr:Internet"
      ],
      "glosses": [
        "Initialism of siktir git."
      ],
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "siktir git",
          "siktir git#Turkish"
        ]
      ],
      "raw_glosses": [
        "(Internet) Initialism of siktir git."
      ],
      "tags": [
        "Internet",
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "sg"
}