Lexiphanicism (LEX•ih•FAN•ih•siz•im) Noun -The use of excessively learned and bombastic vocabulary or phraseology in a pretentious fashion. -An instance or example of such vocabulary or phraseology. -The habit of using a pompous or turgid style in speaking or writing. -The use of pretentious words, language, or style. Adjective form: Lexiphanic.