adverb (r)

• not methodically or according to plan

  tidak methodically atau sesuai rencana

  Example:
  He dealt with his course work casually.
  

  source: wordnet30
• in an unconcerned manner

  dalam satu sikap tenang

  Example:
  Glanced casually at the headlines.
  

  Synonym:
  nonchalantly, unconcernedly
  

  source: wordnet30
• Without design; accidentally; fortuitously; by chance; occasionally.

  tanpa desain; secara tidak sengaja; fortuitously; secara kebetulan; sesekali.

  source: webster1913