WagyuPronunciation: /ˈwɑːgjuː/Definition of Wagyu noun [mass noun, often as modifier] any of several breeds of Japanese cattle producing tender, marbled beef that typically contains a high percentage of saturated fat. the beef obtained from Wagyu cattle. Origin:Japanese, from wa 'Japanese' + gyu 'cattle, beef'Wagyu in other Oxford dictionaries Definition of Wagyu in the US English dictionary