An abrupt rise refers to a sudden and significant increase in something, often used to describe a rapid or unexpected change in a particular variable. Full definition
The rather abrupt rise in interest rates this year has probably also played a part, and is certainly responsible for some of the increase in the stock market's volatility. (stmmltd.com)
Evidently the hundred - thousand - year glacial cycles did follow a sawtooth pattern: each cycle showed a slow descent into a long - lasting cold state that ended with a mysteriously abrupt rise of temperature. (history.aip.org)
Certainly the rather abrupt rise in the rate of «unplaced lawyer candidates» — students unable to find articling positions — from 5.8 % in 2008 to 12.1 % in 2011 is an eye - popper and potentially a game changer. (slaw.ca)