"м.б." meaning in Russian

{
  "forms": [
    {
      "form": "m.b.",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "м.б. • (m.b.)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "móžet bytʹ, “may be, maybe, perhaps”",
          "word": "мо́жет быть"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "initialism of мо́жет быть (móžet bytʹ, “may be, maybe, perhaps”)"
      ],
      "id": "en-м.б.-ru-adv-MeKssO4T",
      "links": [
        [
          "мо́жет быть",
          "может быть#Russian"
        ],
        [
          "may be",
          "may be"
        ],
        [
          "maybe",
          "maybe"
        ],
        [
          "perhaps",
          "perhaps"
        ]
      ],
      "synonyms": [
        {
          "roman": "m. b.",
          "word": "м. б."
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "м.б."
}

{
  "forms": [
    {
      "form": "m.b.",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "м.б. • (m.b.)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "móžet bytʹ, “may be, maybe, perhaps”",
          "word": "мо́жет быть"
        }
      ],
      "categories": [
        "Russian abbreviations",
        "Russian adverbs",
        "Russian entries with incorrect language header",
        "Russian initialisms",
        "Russian lemmas",
        "Russian links with redundant wikilinks",
        "Russian terms spelled with .",
        "Russian terms with redundant head parameter"
      ],
      "glosses": [
        "initialism of мо́жет быть (móžet bytʹ, “may be, maybe, perhaps”)"
      ],
      "links": [
        [
          "мо́жет быть",
          "может быть#Russian"
        ],
        [
          "may be",
          "may be"
        ],
        [
          "maybe",
          "maybe"
        ],
        [
          "perhaps",
          "perhaps"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "synonyms": [
    {
      "roman": "m. b.",
      "word": "м. б."
    }
  ],
  "word": "м.б."
}