adjective (a)

• having succeeded or being marked by a favorable outcome(adj.all)

  Example:
  A successful architect.
  A successful business venture.
  

  Antonym:
  unsuccessful
  

  source: wordnet30
• Resulting in success; assuring, or promotive of, success; accomplishing what was proposed; having the desired effect; hence, prosperous; fortunate; happy; as, a successful use of medicine; a successful experiment; a successful enterprise.(adjective)

  source: webster1913