water closet

• water-closet, watercloset

water closet (plural water closets)

1. (chiefly Britain) A room containing a flush toilet.
2. (Britain) A flush toilet itself.
   • "The English Origins: There was a noble origin to the water closet in its earliest days. Sir John Harington, godson to Queen Elizabeth, set about making a "necessary" for his godmother and himself in 1596. A rather accomplished inventor, Harington ended his career with this invention, for he was ridiculed by his peers for this absurd device. He never built another one, though he and his godmother both used theirs."
3. Used other than with a figurative or idiomatic meaning: see water,‎ closet.

• (room with a toilet): See Thesaurus:bathroom
• (toilet): See Thesaurus:toilet

• (as a lavatory): closet

• WC
• earth closet