(Eastern United States) A type of swamp or shallow lake system, typically formed as or by the backwater of a larger waterway, similar to a bayou with trees.
We paddled under a canopy of trees through the slough.
(Western United States) A secondary channel of a river delta, usually flushed by the tide.
A state of depression.
John is in a slough.
A small pond, often alkaline, many but not all formed by glacial potholes.
Potholes or sloughs formed by a glacier’s retreat from the central plains of North America, are now known to be some of the world’s most productive ecosystems.
Slough meaning : The skin shed by a snake or other reptile. Dead skin on a sore or ulcer. To shed (skin). To slide off (like a layer of skin). To discard. (Western US) To commit truancy, be absent from school without permission. (compare ditch)