definition of
[abrupt]

[1] #1 abrupt s. [disconnected] marked by sudden changes in subject and sharp transitions; "abrupt prose". wn

[2] #2 abrupt s. exceedingly sudden and unexpected; "came to an abrupt stop"; "an abrupt change in the weather". wn

[3] #3 abrupt s. [precipitous, sharp] extremely steep; "an abrupt canyon"; "the precipitous rapids of the upper river"; "the precipitous hills of Chinese paintings"; "a sharp drop". wn

[4] #4 abrupt s. surprisingly and unceremoniously brusque in manner; "an abrupt reply". wn