fifth wheel

noun

Definition of fifth wheel

  1. 1a :  a horizontal wheel or segment of a wheel that consists of two parts rotating on each other above the fore axle of a carriage and that forms support to prevent tippingb :  a similar coupling between tractor and trailer of a semitrailer

  2. 2 :  one that is superfluous, unnecessary, or burdensome

Examples of fifth wheel in a Sentence

  1. He felt more and more like a fifth wheel at the office.

Circa 1874

First Known Use of fifth wheel

circa 1874


FIFTH WHEEL Defined for English Language Learners

fifth wheel

noun

Definition of fifth wheel for English Language Learners

  • : an extra person who is not needed in a group


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