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

 

turbocharger

 noun
noun
BrE BrE//ˈtɜːbəʊtʃɑːdʒə(r)//
 
; NAmE NAmE//ˈtɜːrboʊtʃɑːrdʒər//
 
(also turbo (pl. turbos))
 
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a system driven by a turbine that gets its power from an engine’s exhaust gases. It sends the mixture of petrol/gas and air into the engine at high pressure, making it more powerful.
See the Oxford Advanced American Dictionary entry: turbocharger