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

 

mamba

 noun
noun
BrE BrE//ˈmæmbə//
 
; NAmE NAmE//ˈmæmbə//
 
Amphibians and reptiles
 
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a black or green poisonous African snake See related entries: Amphibians and reptiles Word Origin mid 19th cent.: from Zulu imamba.
See the Oxford Advanced American Dictionary entry: mamba