Making or having the disposition to make unwarrantable claims of rank or estimation; giving one's self an undue degree of importance; aggressively haughty; full of assumption: applied to persons.Characterized by arrogance; proceeding from an overestimate of one's importance or superiority to others: applied to things: as, arrogant claims.Synonyms Authoritative, Magisterial, Dogmatic, etc. (see magisterial), proud, assuming, overbearing, presumptuous, supercilious, lordly, cavalier, important, swelling, blustering, grand, disdainful, overweening.