Definition
Rated maximum continuous thrust with respect to turbojet engine type certification, means the approved jet thrust that is developed statically or in flight, in standard atmosphere at a specified altitude, without fluid injection and without the burning of fuel in a separate combustion chamber, within the engine operating limitations established under part 33 of this chapter, and approved for unrestricted periods of use.
Source: 14 CFR § 1.1 (verbatim from the Federal Aviation Regulations).