'Motorbike' definitions:

Definition of 'motorbike'

(from WordNet)
noun
Small motorcycle with a low frame and small wheels and elevated handlebars [syn: minibike, motorbike]
verb
Ride a motorcycle [syn: motorbike, motorcycle, cycle]

Definition of 'Motorbike'

From: GCIDE
  • Motorbike \Mo"tor*bike`\, n.
  • 1. a light two-wheeled vehicle containing a motor for propulsion. It is lighter in construction and has a lower speed than a motorcycle. [PJC]
  • 2. Specifically: a small motorcycle with a low frame and small weels and elevated handlebars.
  • Syn: minibike. [WordNet 1.5]
  • 3. Specifically: a bicyle with a motor attached for propulsion. [PJC]