General Definition: 1. A cylinder that moves up and down inside another one or any thing or any action that can be associated with this in context. As a Noun: 1. A device in a car which contracts and expands in order to absorb sudden movement. English = shock absorber. Note: 1. There appears to be no commonly used Auslan sign for SHOCK ABSORBER for most signers (but signers can represent this visually using depicting signs in context). Source of this recommended sign: Victorian College for the Deaf.