granulitePronunciation: /ˈgranjʊlʌɪt/Definition of granulite noun [mass noun] Geology a fine-grained granular metamorphic rock in which the main component minerals are typically feldspars and quartz: [as modifier]:the granulite faciesDerivatives granuliticPronunciation: /-ˈlɪtɪk/ adjective Origin: mid 19th century: from granule + -ite1granulite in other Oxford dictionaries Definition of granulite in the US English dictionary