"вплотную" meaning in Russian

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "в-",
        "3": "пло́тный"
      },
      "expansion": "в- (v-) + пло́тный (plótnyj)",
      "name": "af"
    }
  ],
  "etymology_text": "в- (v-) + пло́тный (plótnyj)",
  "forms": [
    {
      "form": "вплотну́ю",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "vplotnúju",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "вплотну́ю"
      },
      "expansion": "вплотну́ю • (vplotnúju)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "related": [
    {
      "_dis1": "0 0",
      "roman": "vplotʹ",
      "word": "вплоть"
    },
    {
      "_dis1": "0 0",
      "roman": "plótnyj",
      "word": "пло́тный"
    }
  ],
  "senses": [
    {
      "glosses": [
        "closely, tightly"
      ],
      "id": "en-вплотную-ru-adv-652ahRzf",
      "links": [
        [
          "closely",
          "closely"
        ],
        [
          "tightly",
          "tightly"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Russian terms prefixed with в-",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "seriously, in earnest"
      ],
      "id": "en-вплотную-ru-adv-mlVZ1qQ3",
      "links": [
        [
          "seriously",
          "seriously"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[fpɫɐtˈnujʊ]"
    },
    {
      "audio": "Ru-вплотную.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/90/Ru-%D0%B2%D0%BF%D0%BB%D0%BE%D1%82%D0%BD%D1%83%D1%8E.ogg/Ru-%D0%B2%D0%BF%D0%BB%D0%BE%D1%82%D0%BD%D1%83%D1%8E.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/90/Ru-%D0%B2%D0%BF%D0%BB%D0%BE%D1%82%D0%BD%D1%83%D1%8E.ogg",
      "text": "Audio"
    }
  ],
  "word": "вплотную"
}

{
  "categories": [
    "Russian 3-syllable words",
    "Russian adverbs",
    "Russian entries with incorrect language header",
    "Russian lemmas",
    "Russian terms prefixed with в-",
    "Russian terms with IPA pronunciation",
    "Russian terms with audio links"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "в-",
        "3": "пло́тный"
      },
      "expansion": "в- (v-) + пло́тный (plótnyj)",
      "name": "af"
    }
  ],
  "etymology_text": "в- (v-) + пло́тный (plótnyj)",
  "forms": [
    {
      "form": "вплотну́ю",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "vplotnúju",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "вплотну́ю"
      },
      "expansion": "вплотну́ю • (vplotnúju)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "related": [
    {
      "roman": "vplotʹ",
      "word": "вплоть"
    },
    {
      "roman": "plótnyj",
      "word": "пло́тный"
    }
  ],
  "senses": [
    {
      "glosses": [
        "closely, tightly"
      ],
      "links": [
        [
          "closely",
          "closely"
        ],
        [
          "tightly",
          "tightly"
        ]
      ]
    },
    {
      "glosses": [
        "seriously, in earnest"
      ],
      "links": [
        [
          "seriously",
          "seriously"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[fpɫɐtˈnujʊ]"
    },
    {
      "audio": "Ru-вплотную.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/90/Ru-%D0%B2%D0%BF%D0%BB%D0%BE%D1%82%D0%BD%D1%83%D1%8E.ogg/Ru-%D0%B2%D0%BF%D0%BB%D0%BE%D1%82%D0%BD%D1%83%D1%8E.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/90/Ru-%D0%B2%D0%BF%D0%BB%D0%BE%D1%82%D0%BD%D1%83%D1%8E.ogg",
      "text": "Audio"
    }
  ],
  "word": "вплотную"
}