Definition of ski-jump:
(n) :
One of a pair of long flat runners designed for gliding over snow or water.
(v) :
(intransitive) To move on skis.
(v) :
(transitive) To travel over (a slope, etc.) on skis; to travel on skis at (a place), (especially as a sport).
(n) :
A trip made by skiing.
(n) :
(aviation) One of a pair of long flat runners under some flying machines, used for landing.