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

 

mecha

 noun
noun
BrE BrE//ˈmekə//
 
; NAmE NAmE//ˈmekə//
 
(pl. mecha, mechas)(from Japanese)
 
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(in Japanese films/movies, games and comics) a large fighting machine in the shape of an animal or person, usually controlled by a person who rides inside it Meanwhile, the rest of the team has to fight off a series of giant animal mecha. Word Origin 1980s: Japanese meka, shortened from mekanizmu ‘mechanism’, mekanikaru ‘mechanical’, etc.