adverb (r)

• at an earlier time or formerly(adv.all)

  Example:
  She had previously lived in Chicago.
  He was previously president of a bank.
  Better than anything previously proposed.
  A previously unquestioned attitude.
  

  Synonym:
  antecedently
  

  source: wordnet30
• Beforehand; antecedently; as, a plan previously formed.(adverb)

  source: webster1913