From WordNet (r) 2.0 (August 2003) [wn]:
jakes
n : a small outbuilding with a bench having holes through which
a user can defecate [syn: outhouse, privy,
earth-closet]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Jakes \Jakes\, n. [Prob. fr. F. Jacques, the proper name. See 2d
Jack.]
A privy. --Shak.
[1913 Webster]