Definition of amateurs:
(n) :
A person attached to a particular pursuit, study, science, or art (such as music or painting), especially one who cultivates any study, interest, taste, or attachment without engaging in it professionally.
(adj) :
Non-professional.
(n) :
Someone who is unqualified or insufficiently skillful.
(adj) :
Showing a lack of professionalism, experience or talent.
(adj) :
Created, done, or populated by amateurs or non-professionals.
(n) :
(now rare) A lover of something.