TaxiingTaxiing refers to an airplane moving under it's own power on the ground, usually on wheels, but also includes aircraft with skis or floats (for water based travel).
The thrust comes from the aircrafts propellers or jet engines and steering by a nose wheel or tail wheel/rudder. Braking is by differential toe brakes. Possible jet blast damage limits engine thrust near terminals.
Helicopters with skids must hover taxi while those with wheels may taxi on the ground. Rotor downwash limits hover taxiing near parked light aircraft.