a small motorcycle for off-road riding, as along dirt trails
trail bike in American English
noun
a small motorcycle designed and built with special tires and suspension for riding on unpaved roads and over rough terrain
Also called: dirt bike
Word origin
[1965–70]This word is first recorded in the period 1965–70. Other words that entered Englishat around the same time include: double-book, genetic engineering, overdub, red-eye, wraparound