Definition of runways:
(n) :
(aviation) A section of land, usually paved, for airplanes to land on or take off from.
(n) :
A narrow walkway (often on a platform) extending from a stage on which people walk, especially one used by models during fashion shows.
(n) :
(athletics) In javelin, long jump, and similar events: a short track along which athletes can accelerate themselves for their jumps or throws.
(n) :
A defined, narrow section of land or an artificial structure used for access.
(n) :
The usual path taken by deer or other wild animals, such as from a forest to a water source.
(n) :
(finance, informal) Hence, the number of months that a startup company can operate by using up its cash reserves.