Fifth Wheel Definition
noun
A horizontal wheel-like structure placed over the front axle of a carriage or wagon to support it on turns.
Webster's New World
A similar structure on the rear of the cab of a tractor-trailer, serving as a coupling for attaching the trailer.
Webster's New World
An additional wheel carried on a four-wheeled vehicle as a spare.
American Heritage
An unnecessary or superfluous person or thing.
Webster's New World
Other Word Forms of Fifth Wheel
Noun
Singular:
fifth wheel
Plural:
fifth-wheelsRelated Articles
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