thine answer IS orbit
is when we are circling in the gravitational field of a large mass, but are travaling at a fast enough speed to not be pulled into the center, this also applies for celestial bodies, the only reason we are shooting straight through the floor is because of the ground...
(i have next to no knowledge about physics so please don't beat me down my there are flaws in my theories)
as they say, time is defined by movement. you might say, "my eraser is perfectly still in my freezer (why you would put it there is beyond my comprehension)" be we are still moving on...
lets not forget the theory of gravitons.
for those who don't know some scientist's believe that there are particles no charge, no mass, and carry energy/gravitational energy, this is almost identical to photons, particles that have no mass or charge but they carry electromagnetic energy,