One who engages in an art, science, study, or athletic activity as a pastime rather than as a profession. Sports an athlete who has never accepted money, or who accepts money under restrictions specified by a regulatory body, for participating in a competition. he surprised those who eye the amateur golf scene in michigan with his win in the amateur, especially when he topped piot, who had piled up a resume of junior wins and a golf association of michigan championship and seemed poised to add the michigan amateur. I wasnt blown away by winning because i felt like i could win it, he said. Amateur definition, a person who engages in a study, sport, or other activity for pleasure rather than for financial benefit or professional reasons. Amateur synonyms, amateur pronunciation, amateur translation, english dictionary definition of amateur. One who engages in an art, science, study, or athletic activity as a pastime rather than as a profession. Amateur definition is - one who engages in a pursuit, study, science, or sport as a pastime rather than as a profession. Should amateur only be used literally? Synonym discussion of amateur.