say it: fawr-MOH-suh
formosa is a noun meaning "an island in southeastern Asia 100 miles off the coast of mainland China in the South China Sea". It carries one recorded sense.
an island in southeastern Asia 100 miles off the coast of mainland China in the South China Sea
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 formosa 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.