"tsss" meaning in English

{
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "hissing sound",
          "word": "tss"
        }
      ],
      "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 with 3 consecutive instances of the same letter",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1928, Griffith Ogden Ellis, American Boy Adventure Stories, page 306",
          "text": "\"Tsss!\" the old man suddenly hissed. \"He saw you bend down. Wait!\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of tss (“hissing sound”)"
      ],
      "id": "en-tsss-en-intj-GZRPxBYq",
      "links": [
        [
          "tss",
          "tss#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "tsss"
}

{
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "hissing sound",
          "word": "tss"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English terms with 3 consecutive instances of the same letter",
        "English terms with quotations",
        "English words without vowels"
      ],
      "examples": [
        {
          "ref": "1928, Griffith Ogden Ellis, American Boy Adventure Stories, page 306",
          "text": "\"Tsss!\" the old man suddenly hissed. \"He saw you bend down. Wait!\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of tss (“hissing sound”)"
      ],
      "links": [
        [
          "tss",
          "tss#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "tsss"
}