(Of a military campaign) begin: the air-attack phase will continue before the ground attack jumps off
More example sentences
- On the morning of 13 May, the 6th Marine Division attack was scheduled to jump off at 0730.
- The attack jumped off six hours later.
- The final assault jumped off at 1515 from a crossroads 500 yards south of Clochimont.
A deciding round in a show-jumping competition.
- Out of the starting field, only six horse-and-rider combinations went clear in the first round to qualify for the jump-off.
- One penalty point separated gold medalists Germany from Switzerland in the equestrian team showjumping, while Brazil beat France in a jump-off for the bronze.
- In the jump-off, riders compete against the clock, as well as the course.