a hollow filled with mud
"The herons waded patiently through the slough, waiting for the right moment to strike at their prey."
a stagnant swamp (especially as part of a bayou)
"The old fishing boat drifted aimlessly through the murky slough that wound deep into the heart of the bayou."
any outer covering that can be shed or cast off (such as the cast-off skin of a snake)
"The old tree was draped in moss and hanging sloughs of bark that crumbled to the ground."
The skin shed by a snake or other reptile.
"The hikers had to carefully navigate through the slough before they could reach the dry path on the other side of the wetland."
A muddy or marshy area.
A town in east Berkshire, England (formerly Buckinghamshire), close to Heathrow Airport.
"We drove past Slough on our way to London for the flight."