1.
If something falls away from the thing it is attached to, it breaks off.
Officials say that one or two engines fell away from the plane shortly after takeoff.
PHRASAL VERB : V P from n , also V P
2.
If you say that land falls away , you mean it slopes downwards from a particular point.
On either side of the tracks the ground fell away sharply.
PHRASAL VERB : V P
3.
If the degree, amount, or size of something falls away , it decreases.
His coalition may hold a clear majority but this could quickly fall away...
= fall off
PHRASAL VERB : V P