Small unmanned aircraft
Small unmanned aircraft means an unmanned aircraft weighing less than 55 pounds on takeoff, including everything that is on board or otherwise attached to the aircraft.
Source
14 CFR § 107.3
Scoping language
The following definitions apply to this part. If there is a conflict between the definitions of this part and definitions specified in 1.1 of this chapter, the definitions in this part control for purposes of this part: