fourth gear
/fɔːrθ ɡɪər/ · fourth.gear
noun
- A gear in a manual transmission system that provides a higher gear ratio, typically used for cruising at high speeds. To get the best fuel efficiency, shift into fourth gear on the highway.
noun
- A stage or level of difficulty or complexity. The fourth gear of the puzzle was the most challenging part to solve.
Did you know? The term 'fourth gear' is often used in racing and performance driving to refer to the gear used for high-speed cruising, where the engine is running at its most efficient speed.