English to English

adverb (r)

• without official authorization

  tanpa izin resmi

  Synonym:
  on the side, unauthorised, unauthorized, wildcat
  

  source: wordnet30
• not in an official capacity

  tidak dalam kapasitas resmi

  Example:
  Unofficially, he serves as the treasurer.
  

  Antonym:
  officially
  

  source: wordnet30