A room equipped with washing and often toilet facilities; a bathroom.(noun)
A washbowl or basin, especially one permanently installed with running water.(noun)
A flush toilet.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "lavatory" in a sentence
"The midcabin lavatory is closer, but I’ve got time to kill, so I turn and pick my way back among the crammed seats."
"The lavatory is also very nice, a serene expanse of cool white that nicely offsets the busy detail of the tile."
"It has a capacity for 4 passengers in its normal configuration, but it can carry up to 6 passengers if the lavatory is removed."