1. Material brought up from the bottom of a river, harbor, or other body of water by dredging; sediment, mud, or debris removed during dredging operations.
Usage: Usually plural; often refers to the accumulated material from dredging activities
2. The act or process of dredging; the operation of removing material from a waterway.
Usage: Less common; often used in technical or nautical contexts

Examples

• The harbor authority disposed of the dredgings in an approved landfill.
• Environmental tests were conducted on the dredgings to check for contamination.
• Heavy dredgings accumulated along the riverbank after the maintenance work.
• The dredgings revealed layers of historical sediment from centuries past.
• Workers carefully managed the dredgings to minimize impact on the ecosystem.
• The cost of handling and transporting dredgings was significant for the project.