Cross between a road bike and a mountain bike, proved feasible after experimental work completed by 19th century Austrian monk Gregor Mendel, who had little inkling that by fooling around with peas he was influencing bicycle design. Other less successful hybrids include a mountain unicycle and a recumbent penny-farthing.
Any vehicle is an hybrid when it combines two or more sources of power that can directly or indirectly provide propulsion power. In fact, many people have probably owned a hybrid vehicle at some point. For example, a moped (a motorized pedal bike) is a type of hybrid because it combines the power of a gasoline engine with the pedal power of its rider.
a city commuting machine, pure and simple
a combination of a mountain bike and a road bike
a decent bike for that type of commute but they are heavy and the upright riding position creates more air drag
a nice all-around utility bike that suits roads and doesn't mind the occasional grassy excursion
Also known as "city bikes", Hybrids have 700c wheels (approx 29" in diameter) with tires that are narrower than found on mountain bikes. Hybrids are similar to comfort bikes as they feature ergonomically-superior upright riding positions, suspension forks, soft grips, cushy saddles and wide-range gearing. Hybrid bikes are generally a bit more efficient than similar comfort bikes, but not quite as comfortable.
The grafting together of a road bike and a mountain bike in a model equally suited for road and trail riding. See also City/Path