1
- a wedge or block placed against a wheel or rounded object, to prevent it from moving（轮子或圆形物下防滚动的）楔子; 垫木。
1.1
- a support on which a rounded structure, such as a cask or the hull of a boat, may be placed to keep it steady（桶等圆形结构的）支架, 支座; （船身的）定盘, 艇座。
2
- a ring with a gap at the top, through which a rope or line is run导缆钩, 导缆器。
with obj.(常作be chocked)
1- prevent the forward movement of (a wheel or vehicle) with a chock用楔子挡住（轮子, 车辆）（防止滚动）。
1.1
- Brit. support (a boat, cask, etc.) on chocks〈英〉将（船、桶等）置于支架上。
词源
Middle English: probably from an Old Northern French variant of Old French çouche, çoche 'block， log'， of unknown ultimate origin.