completist /kəmˈpliːtɪst/noun 2adjective 1forms 3 noun2 •A collector who strives to obtain a complete collection of some type of thing, especially a fan who aims to own or consume the complete output of a particular author, publisher, musician or band.Ozzie Train, secretary. Ozzie needs little introduction, other than that he is the remaining half of Prime Press, and a genuine completist. — 1953 •A person who champions any philosophy which focuses on the completeness of something.A completist philosopher holds that a definite complete body of knowledge exists to be discovered. adjective1 •Which attempts to collect something completely.The completist collector of Conan will want not only all the Conan paperbacks, but also those about Conan or using the name Conan to promote sales of other books by Robert E. Howard. — 1982 formscompletists · more completist · most completist