amateur noun
1 sb who does sport, etc. for pleasure, not money
ADJ. competent, gifted, talented, top | enthusiastic, keen | gentleman International affairs today are no longer for gentleman amateurs.
2 sb who is not very good at sth
ADJ. rank, real The others had been skiing since they could walk and made her look a rank amateur.
You can also check other dicts: amateur (English, 中文解释 ), wordnet sense, Collins Definition