What is Abrupt?
Abrupt definition and meaning on Dictionary terms:
sudden or unexpected: an abrupt departure.
curt or brusque in speech, manner, etc.: an abrupt reply.
terminating or changing suddenly: an abrupt turn in a road.
having many sudden changes from one subject to another; lacking in continuity or smoothness: an abrupt writing style.
steep; precipitous: an abrupt descent.
Botany. truncate(def 4).