"ноль-ноль" meaning in Russian

{
  "etymology_text": "Pronunciation of the two zeros, representing the minutes in a written time.",
  "forms": [
    {
      "form": "ноль-но́ль",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nolʹ-nólʹ",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ноль-но́ль"
      },
      "expansion": "ноль-но́ль • (nolʹ-nólʹ)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "english": "We are meeting at the station at four o'clock sharp.",
          "roman": "Vstrečájemsja na vokzále v šestnádcatʹ nolʹ-nólʹ.",
          "text": "Встреча́емся на вокза́ле в шестна́дцать ноль-но́ль.",
          "type": "example"
        }
      ],
      "glosses": [
        "o'clock (sharp), hundred hours (used to indicate a time exactly on the hour)"
      ],
      "id": "en-ноль-ноль-ru-adv-QovWNqxb",
      "links": [
        [
          "o'clock",
          "o'clock"
        ],
        [
          "sharp",
          "sharp"
        ],
        [
          "hundred hours",
          "hundred hours"
        ]
      ],
      "related": [
        {
          "roman": "nolʹ",
          "word": "ноль"
        },
        {
          "roman": "nulʹ",
          "word": "нуль"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˌnolʲ ˈnolʲ]"
    }
  ],
  "word": "ноль-ноль"
}

{
  "etymology_text": "Pronunciation of the two zeros, representing the minutes in a written time.",
  "forms": [
    {
      "form": "ноль-но́ль",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nolʹ-nólʹ",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ноль-но́ль"
      },
      "expansion": "ноль-но́ль • (nolʹ-nólʹ)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "related": [
    {
      "roman": "nolʹ",
      "word": "ноль"
    },
    {
      "roman": "nulʹ",
      "word": "нуль"
    }
  ],
  "senses": [
    {
      "categories": [
        "Russian adverbs",
        "Russian lemmas",
        "Russian multiword terms",
        "Russian terms with IPA pronunciation",
        "Russian terms with usage examples"
      ],
      "examples": [
        {
          "english": "We are meeting at the station at four o'clock sharp.",
          "roman": "Vstrečájemsja na vokzále v šestnádcatʹ nolʹ-nólʹ.",
          "text": "Встреча́емся на вокза́ле в шестна́дцать ноль-но́ль.",
          "type": "example"
        }
      ],
      "glosses": [
        "o'clock (sharp), hundred hours (used to indicate a time exactly on the hour)"
      ],
      "links": [
        [
          "o'clock",
          "o'clock"
        ],
        [
          "sharp",
          "sharp"
        ],
        [
          "hundred hours",
          "hundred hours"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˌnolʲ ˈnolʲ]"
    }
  ],
  "word": "ноль-ноль"
}