say it: uh-PAW-stayt
apostate is a noun and adjective meaning "a disloyal person who betrays or deserts his cause or religion or political party or friend etc.". It carries 2 recorded senses.
not faithful to religion or party or cause
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 apostate 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.