As a Noun: 1. In a vehicle, the part of the car that holds the fluid used in the power steering system. English = power steering reservoir. Note: 1. A combination of the Auslan sign ELECTRICITY + JAR. 2. There appears to be no commonly used Auslan sign for POWER STEERING RESERVOIR for most signers (but some signers represent this visually using these depicting signs, once they have established the topic). If you know a sign for POWER STEERING RESERVOIR used by you or other Auslan users (deaf people or interpreters) please go to "Report missing sign" and supply details. Thank you. Source of this recommended sign: Victorian College for the Deaf.