a motor vehicle
similar to a bicycle but usually larger and heavier, chiefly for one rider but sometimes having two saddles or an attached sidecar for passengers.
verb (used without object), motorcycled, motorcycling.
to ride on or operate a motorcycle.
motorcyclist /ˈmoʊtərˌsaɪklɪst/ [moh-ter-sahy-klist] Show IPA , noun