"five-o" meaning in English

{
  "etymology_text": "From the police procedural television series Hawaii Five-O (first aired in 1968), so named because it is set in Hawaii, which is the 50th U.S. state.\nThere is another theory on this that, in the 80s unmarked ford police cars in the United States where identifiable by being equipped with the 5.0 badge on the front quarter panel due to the police pack used as unmarked cars having a 5 litre v8.\nLookouts for street drug dealers would call out 5 O! To say possible cop! Don't approach car.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "five-o (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The police."
      ],
      "id": "en-five-o-en-noun-ArbpzIom",
      "links": [
        [
          "police",
          "police"
        ]
      ],
      "qualifier": "street slang",
      "raw_glosses": [
        "(US, slang, street slang) The police."
      ],
      "synonyms": [
        {
          "word": "5-O"
        },
        {
          "word": "five-oh"
        }
      ],
      "tags": [
        "US",
        "slang",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-five-o.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/91/En-au-five-o.ogg/En-au-five-o.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/91/En-au-five-o.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "five-o"
}

{
  "etymology_text": "From the police procedural television series Hawaii Five-O (first aired in 1968), so named because it is set in Hawaii, which is the 50th U.S. state.\nThere is another theory on this that, in the 80s unmarked ford police cars in the United States where identifiable by being equipped with the 5.0 badge on the front quarter panel due to the police pack used as unmarked cars having a 5 litre v8.\nLookouts for street drug dealers would call out 5 O! To say possible cop! Don't approach car.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "five-o (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with audio links",
        "English uncountable nouns"
      ],
      "glosses": [
        "The police."
      ],
      "links": [
        [
          "police",
          "police"
        ]
      ],
      "qualifier": "street slang",
      "raw_glosses": [
        "(US, slang, street slang) The police."
      ],
      "tags": [
        "US",
        "slang",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-five-o.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/91/En-au-five-o.ogg/En-au-five-o.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/91/En-au-five-o.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "5-O"
    },
    {
      "word": "five-oh"
    }
  ],
  "word": "five-o"
}