means a fixed bathroom fixture, usually porcelain with a flushing water mechanism, used for the disposal of human waste; by extension, the room containing it.

from From French toilette, 'a little cloth' — a diminutive of toile, 'cloth' (itself from Latin tela, 'web, woven fabric'). The word began as something genteel and entirely unrelated to plumbing: a toilette was the cloth draped over a dressing table, then the table itself, then the whole ritual of grooming and dressing (we still 'make our toilette'). Over centuries the meaning slid euphemistically from the dressing room toward the washing room and finally to the fixture inside it — a polite word that crept downhill until it landed squarely on the bowl.