1. a brain injury caused by a blow to the head or violent shaking, resulting in temporary loss of brain function
Usage: medical
2. a violent shock or impact
Usage: formal

Examples

• The football player suffered a concussion during the game.
• She was diagnosed with a mild concussion after the car accident.
• The doctor checked for signs of concussion following the fall.
• He experienced headaches and dizziness from the concussion.
• The explosion created a powerful concussion that shattered windows.
• The concussion from the blast knocked him to the ground.