ungenius noun2 •A person who is not a genius.Serenus Zeitblom, serene flower of the age, good-hearted, long-winded, the ungenius par excellence whose ungenius is his license to speak. — 1995 •Lack of genius.Serenus Zeitblom, serene flower of the age, good-hearted, long-winded, the ungenius par excellence whose ungenius is his license to speak. — 1995 formsungeniuses