- a knife with the blade pivoted to fold into a recess in the handle
- a former name for a type of dive in which the diver bends at the waist in midair,
with his legs straight and his hands touching his feet, finally straightening out
and entering the water headfirst: forward pike dive
- (of an articulated lorry) to go out of control in such a way that the trailer swings
round at an angle to the cab
- to make a jackknife dive
Example Sentences Including 'jackknives'
The mammal was freed from gill netting by a group of volunteers using jackknives and buoys, just east of Grand Manan.
Globe and Mail (2003)
to comment on this word.