单词 | fifth wheel |
释义 | fifth wheelnoun chiefly North American 1An extra wheel for a four-wheeled vehicle.Mann adds that a sliding fifth wheel helps drivers get into tight places....
1.1 informal A superfluous person or thing.Though they tried to include me in their activities I generally declined their invitations not wanting to be a third wheel or a fifth wheel or a seventh wheel....
2A coupling between a vehicle used for towing and a trailer.We are now equipped with a new truck and fifth wheel and ready to follow the sun once more. 2.1 (also fifth-wheel trailer) A trailer with accommodation for camping out.We'd buy a large pickup truck and a fifth-wheel trailer and would travel the United States indefinitely - a retirement many couples enjoy immensely....
3 historical A horizontal turntable over the front axle of a carriage as an extra support to prevent its tipping. |
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