1. water that overflows land at flood tide or is affected by the rise and fall of tides
Usage: often used in plural form
2. low-lying coastal land that is subject to tidal flooding
Usage: geographical; often used in plural form

Examples

• The tidewaters flooded the marsh twice daily.
• Many birds feed in the shallow tidewaters during low tide.
• The tidewaters of the Chesapeake Bay support diverse marine life.
• Settlers avoided building in the tidewaters to prevent flood damage.
• The tidewaters region is known for its rich fishing grounds.
• Storm surges can push tidewaters far inland.
• The tidewaters provide important nursery habitat for fish.