say it: LAV-uh-taw-ree
lavatory is a noun meaning "a room or building equipped with one or more toilets". It carries 3 recorded senses.
a toilet that is cleaned of waste by the flow of water through it
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for lavatory come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.