"555" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "555 (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Canadian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Fiction",
          "orig": "en:Fiction",
          "parents": [
            "Artistic works",
            "Art",
            "Culture",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "555-2368, that's a 555 number, it isn't real.",
          "type": "example"
        },
        {
          "text": "1-555-321-2368, that's a 555 number, it isn't real.",
          "type": "example"
        },
        {
          "text": "(555)234-2368, that's a 555 number, it isn't real.",
          "type": "example"
        }
      ],
      "glosses": [
        "Pertaining to a fake telephone number. The local exchange and area code number 555 was reserved in North American dialing plan for fictional numbers, prior to the 21st century."
      ],
      "id": "en-555-en-adj-K2x5VYTC",
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "fiction",
          "fiction"
        ]
      ],
      "raw_glosses": [
        "(Canada, US, fiction) Pertaining to a fake telephone number. The local exchange and area code number 555 was reserved in North American dialing plan for fictional numbers, prior to the 21st century."
      ],
      "synonyms": [
        {
          "word": "1-311-555-2368"
        },
        {
          "word": "1-555"
        },
        {
          "word": "1-555-555-5555"
        },
        {
          "word": "2368"
        },
        {
          "word": "555-2368"
        },
        {
          "word": "555-5555"
        },
        {
          "word": "555-1212"
        }
      ],
      "tags": [
        "Canada",
        "US",
        "not-comparable"
      ],
      "topics": [
        "fiction",
        "literature",
        "media",
        "publishing"
      ]
    }
  ],
  "sounds": [
    {
      "homophone": "five"
    },
    {
      "homophone": "five"
    },
    {
      "homophone": "five"
    }
  ],
  "word": "555"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "555 (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "American English",
        "Canadian English",
        "English adjectives",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English placeholder terms",
        "English terms spelled with numbers",
        "English terms with homophones",
        "English terms with usage examples",
        "English uncomparable adjectives",
        "English words without vowels",
        "en:Fiction"
      ],
      "examples": [
        {
          "text": "555-2368, that's a 555 number, it isn't real.",
          "type": "example"
        },
        {
          "text": "1-555-321-2368, that's a 555 number, it isn't real.",
          "type": "example"
        },
        {
          "text": "(555)234-2368, that's a 555 number, it isn't real.",
          "type": "example"
        }
      ],
      "glosses": [
        "Pertaining to a fake telephone number. The local exchange and area code number 555 was reserved in North American dialing plan for fictional numbers, prior to the 21st century."
      ],
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "fiction",
          "fiction"
        ]
      ],
      "raw_glosses": [
        "(Canada, US, fiction) Pertaining to a fake telephone number. The local exchange and area code number 555 was reserved in North American dialing plan for fictional numbers, prior to the 21st century."
      ],
      "tags": [
        "Canada",
        "US",
        "not-comparable"
      ],
      "topics": [
        "fiction",
        "literature",
        "media",
        "publishing"
      ]
    }
  ],
  "sounds": [
    {
      "homophone": "five"
    },
    {
      "homophone": "five"
    },
    {
      "homophone": "five"
    }
  ],
  "synonyms": [
    {
      "word": "1-311-555-2368"
    },
    {
      "word": "1-555"
    },
    {
      "word": "1-555-555-5555"
    },
    {
      "word": "2368"
    },
    {
      "word": "555-2368"
    },
    {
      "word": "555-5555"
    },
    {
      "word": "555-1212"
    }
  ],
  "word": "555"
}