underdrive Definition
a gear ratio in a motor vehicle's transmission that reduces the output speed of the drive shaft in relation to the engine speed.
Using underdrive: Examples
Take a moment to familiarize yourself with how "underdrive" can be used in various situations through the following examples!
Example
The underdrive gear is used for slow and steady driving on steep inclines.
Example
The truck's underdrive system allows it to carry heavy loads up steep hills without overheating.
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Summary: underdrive in Brief
The term 'underdrive' [uhn-der-drahyv] refers to a gear ratio in a vehicle's transmission that reduces the output speed of the drive shaft in relation to the engine speed. It is used for slow and steady driving on steep inclines or when carrying heavy loads.
