Is falling a mode of flying?
Since falling is just the final result of a ballistic arc if you let it go long enough, and ballistic arcs are considered "flight" per the Oxford Dictionary (as in the ballistic arcs of balls, spacecraft, arrows, etc being considered "flights"), then technically, a falling object is in flight.   

You could give it just the tiniest lateral push when you drop it so it goes down with a slight ballistic curve;  in the end, no different from driving it laterally so it has horizontal energy/inertia with a high velocity that exactly counteracts gravitational pull, and give it a vacuum so it can do that indefinitely - a satellite - , the only difference being that and the ball being the location in or out of the atmosphere and energy put into it.

In other words, orbital vehicles, baseballs, bullets, are all "falling" and are technically in flight, and so is a ball you drop straight down... if the Oxford Dictionary definition is what you want to use.

In my own airplane, if I push over with just the right elevator input, and go zero G, my plane is now in a ballistic arc.  The wings are superfluous, for a few seconds anyway, and my plane is "falling", just not straight down.  So if you accept that in that condition it is still "flying", the falling is flight.