say it: kuh-LAY
calais is a noun meaning "a town in northern France on the Strait of Dover that serves as a ferry port to England; in 1347 it was captured by the English king Edward III after a long siege and remained in English hands until it was recaptured by the French king Henry II in 1558". It carries one recorded sense.
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 calais 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.