from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A two-wheeled motor vehicle resembling a heavy bicycle, sometimes having two saddles and a sidecar with a third wheel.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An open-seated motor-powered vehicle with two wheels.
  • v. To motor around on a motorcycle; to ride.

from the GNU version of the Collaborative International Dictionary of English

  • n. A two-wheeled vehicle having a motor attached so as to be self-propelled. In common usage, a motorcycle is of heavier construction with larger wheels, a more powerful motor, and a higher maximum speed than a motorbike.
  • intransitive v. to ride a motorcycle.

from The Century Dictionary and Cyclopedia

  • n. A bicycle or tricycle operated by some form of motor as well as by pedals.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a motor vehicle with two wheels and a strong frame
  • v. ride a motorcycle


motor + (bi)cycle.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From motor + cycle. (Wiktionary)



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