WordNet sense 1 (a room or building equipped with one or more toilets):

bathroom, can, john, lavatory, toilet, lav

WordNet sense 2 (a small outbuilding with a bench having holes through which a user can defecate):

outhouse, earth-closet, jakes

WordNet sense 3 (confined to particular persons or groups or providing privacy):

private

WordNet sense 4 (hidden from general view or use):

secluded, secret

WordNet sense 5 (having much knowledge or education):

informed