A privy; especially, a privy furnished with a contrivance for introducing a stream of water to cleanse it.(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "water-closet" in a sentence
"So I arose and went to the water-closet, but not finding him there, went down to the kitchen, where I saw a slave-girl; and when I enquired for him, she showed him to me lying with one of the cookmaids."
"Indeed thou hast loitered long in the water-closet."
"No one is ignorant that our character and turn of mind are intimately connected with the water-closet."