The Oxford Thesaurus An A-Z Dictionary of Synonyms - amateur n.

1) layman, non-professional, tiro or tyro; dabbler, dilettante, bungler; Colloq US bush-leaguer: When it comes to repairing cars, I'm a mere amateur. --adj. 2) lay, non-professional, untrained; unpaid; dilettante, amateurish, unprofessional, unskilled, inexpert, unskilful, clumsy, mediocre, inferior, crude, bungling, second-rate; Colloq US bush-league: The amateur theatre group's performance received excellent reviews. These paintings are strictly amateur and totally without merit.