n. the level, low-lying land bordering a stream; interval.
See also: flat (def. 1)
- 1922  The only breaks in the endless panorama of cut-banks, mud-flats, willows, and grass were occasional little inlets, gay with aquatic flowers.
- 1959  Built on mud flats in the Mackenzie River delta, Aklavik was a quagmire in summer, had no water supply, no airfield or much possibility of building one.