From WordNet (r) 2.0 (August 2003) [wn]:
fosse
n : ditch dug as a fortification and usually filled with water
[syn: moat]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Fosse \Fosse\, n. [F., fr. L. fossa, fr. fodere, fossum, to
dig.]
1. (Fort.) A ditch or moat.
[1913 Webster]
2. (Anat.) See Fossa.
[1913 Webster]
Fosse road. See Fosseway.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Ditch \Ditch\ (?; 224), n.; pl. Ditches. [OE. dich, orig. the
same word as dik. See Dike.]
1. A trench made in the earth by digging, particularly a
trench for draining wet land, for guarding or fencing
inclosures, or for preventing an approach to a town or
fortress. In the latter sense, it is called also a moat
or a fosse.
[1913 Webster]
2. Any long, narrow receptacle for water on the surface of
the earth.
[1913 Webster]