(n.) An inlet from the Gulf of Mexico, from a lake, or from a large river, sometimes sluggish, sometimes without perceptible movement except from tide and wind.

affluent arm armlet bay belt bight billabong boca branch confluent confluent stream cove creek dendritic drainage pattern effluent estuary euripus feeder fjord fork frith gulf gut harbor inlet kyle loch mouth narrow narrow seas narrows natural harbor prong reach road roads roadstead slough sound strait straits tributary