Meaning of “amateur” - Learner’s Dictionary

amateur

noun [ C ] uk us /ˈæmətər/
HOBBY

someone who does something as a hobby and not as their job

NO SKILL

someone who is not good at what they do:

I won't be giving them any more work - they're a bunch of amateurs.

(Definition of “amateur noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)