"Terminal velocity" is the maximum velocity of a body as it falls through air. Mathematically, the velocity at ground increases with the starting height, but beyond a certain height the increase is negligible.
That is really not true, due to the fact that the atmosphere gets less dense at higher altitudes.
Jumping out of a plane at 12,000 feet, an average-sized man will reach a terminal velocity of between 100 and 120 mph in about 12 seconds.
If the same man jumps out at 180,000 feet, his terminal velocity would be supersonic.