from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A vehicle consisting of a light frame mounted on two wire-spoked wheels one behind the other and having a seat, handlebars for steering, brakes, and two pedals or a small motor by which it is driven.
- n. An exercise bicycle.
- intransitive v. To ride or travel on a bicycle.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A vehicle that has two wheels, one behind the other, a steering handle, and a saddle seat or seats and is usually propelled by the action of a rider’s feet upon pedals.
- n. A traveling block used on a cable in skidding logs.
- n. The best possible hand in lowball.
- v. To travel or exercise using a bicycle.
from the GNU version of the Collaborative International Dictionary of English
- n. A light vehicle having two wheels one behind the other. It has a saddle seat and is propelled by the rider's feet acting on cranks or levers.
from The Century Dictionary and Cyclopedia
- n. A modification of the two-wheeled velocipede (which see).
- To ride on a bicycle.
- n. A traveling block used on a cable in steam-skidding.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a wheeled vehicle that has two wheels and is moved by foot pedals
- v. ride a bicycle
Probably bi-1 + -cycle (on the model of tricycle, three-wheeled coach).(American Heritage® Dictionary of the English Language, Fourth Edition)
From bi- (“two”) + Ancient Greek κύκλος (kuklos, "circle, wheel"), on the pattern of tricycle. (The English word is sometimes said to derive from French, but this is probably incorrect; French sources say the French word derives from English.) (Wiktionary)