reverse gear
From Longman Dictionary of Contemporary EnglishRelated topics: Motor vehiclesreverse gearreˌverse ˈgear noun [countable, uncountable] TTCthe position of the gears in a vehicle that makes it go backwardsExamples from the Corpusreverse gear• After some time, he finally started the engine and crunched into reverse gear.• Thus the movement, seen from close by, appears to go into reverse gear.• The machine has no reverse gear.• In fact, it's surprising Honda hasn't included an electrically operated reverse gear.