Definition of tosa noun from the Oxford Advanced Learner's Dictionary

 

tosa

 noun
noun
BrE BrE//ˈtəʊ//
 
; NAmE NAmE//ˈtoʊ//
 
Domesticated mammals
 
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a large strong dog originally kept for fighting See related entries: Domesticated mammals Word Origin 1940s: from Tosa, the name of a former province in Japan.