noun \ˈmō-tō-ˌkrs\

: the sport of racing motorcycles over a rough course with many hills, sharp turns, etc.

Full Definition of MOTOCROSS

:  a closed-course motorcycle race over natural or simulated rough terrain (as with steep inclines, hairpin turns, and mud); also :  the sport of engaging in motocross races


French, from moto motorcycle (short for motocyclette) + cross-country, from English
First Known Use: 1951


noun    (Concise Encyclopedia)

Motocross racing—Kinney Jones

Form of motorcycle racing in which cyclists compete on a closed course marked out over natural or simulated rough terrain. Courses vary widely but must be 1.5–5 km (1–3 mi) in length, with steep inclines, hairpin turns, and mud. Motorcycles are grouped into classes according to engine displacement (e.g., 125-, 250-, 500-cc). It is probably the most physically demanding motorcycle sport.


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