I know the popular definition of Overlanding as: vehicle based long distance travel with the journey is the goal not the destination. However how do we define a vehicle? I know there are some motorcycle overlanders on this site. Motorycles have been doing overlanding since before automobiles went mainstream. What about alternative vehicles: cyclecars, trikes, EV's, ATV's, SXS, buggies, electric hybrids? Do we have to have an engine to be overlanding and supported by this community? With so many new classes of vehicles being used to traverse the planet how do we define a "Vehicle" as applied to Overlanding? If we are specifically talking motorized vehicles how do we define a motor? A human can be an motor for a vehicle, electric motor power, early days automobiles and cycle cars many were powered by steam and some by electricity.