1. a strong forward movement or flow of something
2. a sudden powerful attack or advance

Examples

• The onrush of water from the broken dam flooded the valley.
• She was swept away by the onrush of the crowd.
• The army prepared for the enemy’s onrush at dawn.
• An onrush of emotions overwhelmed him at the news.
• The onrush of technology has changed how we communicate.
• Traffic came to a halt during the onrush of commuters.
• The onrush of wind nearly knocked her over.