n. （马术）沟；壕沟；水道（ditch的复数）
vt. 开沟于…；挖沟（ditch的第三人称单数）

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}.

2. Any long, narrow receptacle for water on the surface of
the earth.