Definition of "mountain bike" [mountain bike]

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "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."