Reference meaning
fifth wheel
Last updated
someone or something that is unwanted and unneeded
Related source terms
Other meanings
2. noun
an extra car wheel and tire for a four-wheel vehicle
3. noun
a steering bearing that enables the front axle of a horse-drawn wagon to rotate
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 05120564-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.