pomposo adjective 1adverb 1noun 1forms 3 adjective1 •Ceremonious and dignified. adverb1 •In a ceremonious and dignified manner. noun1 •(slang, disapproving) An arrogant, boastful or self-important person.I have heard that this pomposo, this braggart, is a Yankee trick too; that he has the front of a lion, the liver of the chicken. — 1876 formspomposos · more pomposo · most pomposo