Definition of vulgar adjective in Oxford Advanced Learner's Dictionary. Meaning , pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. VULGAR meaning : 1. not suitable, simple, dignified or beautiful; not in the style preferred by the upper classes of…. Learn more. Learn the 26 meanings of the adjective vulgar , from its origin in Latin to its usage in various fields. Find out how common, how pronounced and how obsolete vulgar is in modern English. The meaning of VULGAR is lacking in cultivation, perception, or taste : coarse. How to use vulgar in a sentence. Synonym Discussion of Vulgar.