Definition of "rocket motor" []

• A rocket engine especially a solid rocket or a hybrid rocket. (noun)

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• "A conventional ballistic shape with a sharp nose, slender body, and tail fins, the ERM-5 was equipped with a T-40RKT rocket motor that had been developed by the Jet Propulsion Laboratory in Pasadena."
• "Modifications to the command and control system and launch facilities, the development of a new third-stage rocket motor for Minuteman II, and the development of new penetration aids are intended to maintain Minuteman's deterrent credibility to the year 2000."
• "A solid-fueled rocket motor attached to the bottom of a communication satellite to lift it to a 22,300-mile-high equatorial orbit."