definition of
lavatory

[1] #1 lavatory n. [toilet, lav, can, john, privy, bathroom] a room or building equipped with one or more toilets. wn

[2] #2 lavatory n. [washbasin, basin, washbowl, washstand] a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face; "he ran some water in the basin and splashed it on his face". wn

[3] #3 lavatory n. [flush toilet] a toilet that is cleaned of waste by the flow of water through it. wn