Meaning - a person who engages in a pursuit, especially a sport, on an unpaid basis.
Example of using it in a sentence "it takes five years for a top amateur to become a real Tour de France rider"
"Nicola is an amateur speller"
non-professional, non-specialist, layman, layperson
Meaning -engaging or engaged in without payment; non-professional.
Example of using it in a sentence "He is an amateur archaeologist"