Hubbardian adjective1 •Of or pertaining to L. Ron Hubbard (1911-1986), American science fiction author and founder of Scientology.From there the Hubbard Association of Scientologists ("scientology" is a new Hubbardian term, meaning the "science of knowledge") is mailing out literature […] — 1957 formsmore Hubbardian · most Hubbardian