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adverb (r)

• with official authorization(adv.all)

  Example:
  The club will be formally recognized.
  

  Synonym:
  officially
  

  source: wordnet30
• in a formal manner(adv.all)

  Example:
  He was dressed rather formally.
  

  Antonym:
  informally
  

  source: wordnet30
• In a formal manner; essentially; characteristically; expressly; regularly; ceremoniously; precisely.(adverb)

  source: webster1913