ununderstanding adjective 1noun 1forms 2 adjective1 •Not understanding....more sympathy with art than the ununderstanding, conceited and vulgar Archbishop of Salzburg... — 1933 noun1 •Failure to understand; incomprehension.But how and why are hard to say or even see. There are cases of ununderstanding mediated by the use of special words but this is not apt to be one of them. — 1972 formsmore ununderstanding · most ununderstanding