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

  • n. A sturdy bicycle distinguished by wide tires and horizontal handlebars, often used for off-road cycling. Also called dirt bike, trail bike.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A bicycle specially designed for off-road riding, typically with straight, flat handlebars, a heavier frame than road bikes, higher ground clearance, and wider tires, sometimes with knobs on them for greater traction.

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

  • n. a bicycle with a sturdy frame and fat tires; originally designed for riding in mountainous country


Sorry, no etymologies found.


  • Volunteers Russell Jones and Randy Lake of the Emery County search-and-rescue team met in the area of the Lower Black Box and took all-terrain vehicles in to check the most inaccessible trailhead that normally can be reached only by mountain bike or on foot.

    127 Hours

  • My five-day road trip will culminate on Sunday night with an unsupported solo attempt to mountain bike the 108-mile White Rim Trail in Canyonlands National Park.

    127 Hours

  • The mountain bike that came free with the washing machine just needed the tyres pumped.

    The Empty Family


Log in or sign up to get involved in the conversation. It's quick and easy.