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English definition of “second”

second

noun [U] (GEAR)    /ˈsek.ənd/ (also second gear)
in a vehicle , the gear that combines power with limited speed and is used when increasing or reducing speed : You'll have to change (down/up) into second.The engine and engine partsEngines and motors
(Definition of second noun (GEAR) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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