By all definitions that my team and I have found, fly-by and short-turn (with respect to military unmanned air vehicle waypoint based flight) mean the same thing. Briefly, this allows the pilot to fly within a capture distance of the waypoint but is not required to fly directly over or through it. In other words, the pilot can start turning before the waypoint is reached.
Current Definition: A short turn will be performed at the turn location. A short turn indicates that the vehicle may begin its turn prior to reaching the waypoint and fly-by it instead of through or over it.
Is there any nuanced difference between these two states so that I might further clarify this in my definition?