1. past tense and past participle of dam; blocked or obstructed the flow of water with a barrier

Examples

• The river was dammed to create a reservoir for the city.
• Beavers had dammed the stream with logs and mud.
• The engineers dammed the waterway to prevent flooding.
• Heavy rains caused debris that dammed the drainage canal.
• The construction crew dammed the creek temporarily during repairs.
• Ancient civilizations dammed rivers to irrigate their crops.