1. a part of a river where the water flows very fast over rocks
Usage: usually plural

Examples

• The canoe overturned in the rapids.
• We could hear the roar of the rapids ahead.
• The river has dangerous rapids that require experienced guides.
• They navigated the rapids successfully.
• The rapids made kayaking exciting but risky.
• White-water rafting takes you through Class V rapids.
• The salmon struggled to swim upstream through the rapids.