1. areas of low-lying land that are flooded in wet seasons or at high tide, and typically remain waterlogged at all times
Usage: plural form

Examples

• The marshlands provide important habitat for migrating birds.
• Developers want to drain the marshlands to build new houses.
• Many rare plants grow only in these coastal marshlands.
• The marshlands act as a natural filter for water runoff.
• We took a boat tour through the marshlands to see wildlife.
• Rising sea levels threaten the delicate ecosystem of the marshlands.