- a ring worn tightly in front of another ring to prevent the latter from slipping off the finger.
Origin of guard ring
First recorded in 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Also called: guard, keeper ring jewellery an extra ring worn to prevent another from slipping off the finger
- an electrode used to counteract distortion of the electric fields at the edges of other electrodes in a capacitor or electron lens