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

 

chainsaw

 noun
noun
BrE BrE//ˈtʃeɪnsɔː//
 
; NAmE NAmE//ˈtʃeɪnsɔː//
 
 
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a tool made of a chain with sharp teeth set in it, that is driven by a motor and used for cutting wood
See the Oxford Advanced American Dictionary entry: chainsaw