1. happening or moving very quickly

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

Examples

• The company experienced rapid growth last year.
• She made rapid progress in learning Spanish.
• The rapid changes in technology surprised everyone.
• His rapid heartbeat indicated he was nervous.
• The kayakers navigated the dangerous rapids carefully.
• We could hear the sound of rapids downstream.
• The river's rapids made crossing impossible.