Definition of amateur:
(n) :
a person attached to a particular pursuit, study, or science as to music or painting; esp. one who cultivates any study or art, from taste or attachment, without pursuing it
professionally; someone who pursues something part time, as a
hobby or not very seriously
"she is an accomplished amateur woodworker."
(adj) :
non-professional; created, done, or populated by a amateurs or non-professionals
"amateur sports"