amateur in WordNet English dictionary

1. someone who pursues a study or sport as a pastime
   amateur 
   
2. an athlete who does not play for pay
   amateur 
   

1. engaged in as a pastime
   "an amateur painter"; "gained valuable experience in amateur theatricals"; "recreational golfers"; "reading matter that is both recreational and mentally stimulating"; "unpaid extras in the documentary"
   amateur  recreational  unpaid 
   
2. lacking professional skill or expertise
   "a very amateurish job"; "inexpert but conscientious efforts"; "an unskilled painting"
   amateurish  amateur  inexpert  unskilled