noun. a cylindrical metal lining used to reduce friction.
noun. an insulating liner in an opening through which conductors pass.
1. Noun, singular or mass Within the center of the ring and trunnion u-joint is a bushing and a lock ring that help maintain the center cross between the rods. 2. Verb, gerund or present participle Continue lowering the press until the socket pushes the bushing all the way through the A-frame and is removed from the arm.