From Longman Dictionary of Contemporary Englishamateuram‧a‧teur1 /ˈamətə, -tʃʊə, -tʃə, ˌæməˈtɜː $ ˈæmətʃʊr, -tər/●くろまる○しろまる○しろまる noun [countable]1JOB/WORKsomeone who does an activity just for pleasure, not as their jobOPP professionala gifted amateurMickelson won his first major golf tournament while still an amateur.2informal someone who you think is not very skilled at somethingYou English are a bunch of amateurs when it comes to romance. —amateurism noun [uncountable]well-meaning amateurismExamples from the Corpusamateur• Expectations for Verplank soared after that tourvictory in 1985, the first by an amateur since Gene Littler in 1954.• Compared to those guys, I'm an amateur.• They are a magnet for tourists, experienced boaters and amateursalike.• It is obvious that it thought the enlightenedamateur, like Hope himself, was the idealjudge.• Jack Lemmon, his longtime amateurpartner, will be absent after 23 consecutiveunsuccessfulattempts to make the pro-am cut.• The orchestra is made up entirely of amateurs.• The cast was made up mostly of amateurs.• From 175 out of 450 countycricketers in 1949 the number of amateurs fell to 72 out of 370 in 1961.• The first time, in 1962, Daley ran a political amateur for sheriff and Ogilvie beat him.• John Enright of the OlympicClub is one of the amateurs.amateuramateur2●くろまる○しろまる○しろまる adjective1doing something for pleasure, or done for pleasure, and not as a jobOPP professionalan amateur golferamateur dramatics British English (=producing or acting in plays for pleasure)2amateurishIt was a very amateur performance.From Longman Business Dictionaryamateuram‧a‧teur /ˈæmətə, -tʃʊə, -tʃə, ˌæməˈtɜːˈæmətʃʊr, -tər/ noun [countable]someone who does an activity for pleasure, not as a jobHe thinks the drawings could be the work of an amateur. —amateur adjectiveamateur photographersOriginamateur(1700-1800)FrenchLatinamator"lover", from amare"to love"