fifth wheel

Other Definitions
fifth wheel (enc)

Noun	1.	fifth wheel - someone or something that is unwanted and unneeded deadwood redundance, redundancy - the attribute of being superfluous and unneeded; "the use of industrial robots created redundancy among workers"
	2.	fifth wheel - an extra car wheel and tire for a four-wheel vehicle spare car wheel - a wheel that has a tire and rim and hubcap; used to propel the car
	3.	fifth wheel - a steering bearing that enables the front axle of a horse-drawn wagon to rotate bearing - a rotating support placed between moving parts to allow them to move easily

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