Noun
One versed in philately; one who collects postage stamps.
Source: Webster's dictionaryA philatelist may, but does not have to, collect stamps. Source: Internet
His collection was passed on to Queen Elizabeth II who, while not a serious philatelist, has a collection of British and Commonwealth first day covers which she started in 1952. Source: Internet
It is not uncommon for the term philatelist to be used to mean a stamp collector. Source: Internet
It is possible to be a philatelist without owning any stamps. Source: Internet