noun
philatelist; stamp collector
A person who studies or collects postage stamps; a somewhat formal or technical term.
彼は熱心なフィラテリストで、珍しい切手をたくさん持っている。
He is an enthusiastic philatelist and owns many rare stamps.
A more common Japanese term for a stamp collector, while フィラテリスト is a loanword with a slightly more formal or academic nuance.
Borrowed from English 'philatelist', ultimately from French 'philatélie'.