1. a motorcycle racing sport held on a closed course with natural or artificial obstacles

Examples

• He competed in motocross championships across the country.
• The motocross track featured steep jumps and sharp turns.
• She bought protective gear before starting motocross training.
• The motocross event drew thousands of spectators.
• His motocross bike was specially designed for rough terrain.
• The young rider showed great skill in motocross competition.