Adjective
1. marked by sudden changes in subject and sharp transitions;
"abrupt prose"2. exceedingly sudden and unexpected;
"came to an abrupt stop""an abrupt change in the weather"3. extremely steep;
"an abrupt canyon""the precipitous rapids of the upper river""the precipitous hills of Chinese paintings""a sharp drop"4. surprisingly and unceremoniously brusque in manner;
"an abrupt reply"