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