Definitions

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

  • n. A lightweight motorcycle designed for use on rough surfaces, such as dirt roads or trails. Also called trail bike.
  • n. See mountain bike.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Alternative spelling of dirtbike.

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

  • n. a lightweight motorcycle equipped with rugged tires and suspension; an off-road motorcycle designed for riding cross country or over unpaved ground

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  • Motorcycles designed for racing over closed circuits, often with jumps, over varied terrain of gravel/mud/sand. Also called motocross bikes, when not being raced, they can also be used for informal off-road recreation, or "mudding".

    February 3, 2008