Helicopter
Helicopter is a type of aircraft without wings with one or two sets of large blades that go round very fast on top. It can land, take off vertically, and stay in one place in the air [Online Cambridge dictionary].
Several types of military helicopters fall into one of the following categories: fighters, which secure control of essential airspaces by driving off or destroying enemy aircraft; bombers, which are larger, heavier, and less-maneuverable craft designed to attack surface targets with bombs or missiles; ground-support, or attack, aircraft, which operate at lower altitudes than bombers and air-superiority fighters and attack tanks, troop formations, and other ground targets; transport and cargo planes, big-bodied craft with large amounts of interior space for carrying weapons, equipment, supplies, and troops over moderate or long distances; helicopters, which are rotary-winged aircraft used for ground support, for transporting assault troops, and for short-distance transport and surveillance; and unmanned aerial vehicles, which are remotely controlled or autonomously guided aircraft that carry sensors, target designators, electronic transmitters, and even offensive weapons [Online Encyclopedia Britannica].
Guilmartin, J.F. (1999). Military aircraft. Online Encyclopedia Britannica. Retrieved from: https://www.britannica.com/technology/military-aircraft#ref57483
Helicopter. Online Cambridge dictionary. Retrieved from: https://dictionary.cambridge.org/dictionary/english/helicopter