Bushing

n.	1.	The operation of fitting bushes, or linings, into holes or places where wear is to be received, or friction diminished, as pivot holes, etc.
	2.	(Mech.) A bush or lining; - sometimes called a thimble. See 4th Bush.

Noun	1.	bushing - an insulating liner in an opening through which conductors pass
	2.	bushing - a cylindrical metal lining used to reduce friction Synonyms: cylindrical lining

backing, ball bearing, bearing, bevel bearing, bush, chassis, doubling, doublure, facing, filler, filling, frame, headstock, infrastructure, inlay, inlayer, insole, interlineation, jewel, liner, lining, mount, mounting, needle bearing, packing, padding, roller bearing, setting, skeleton, stuffing, thrust bearing, underframe, wadding, wainscot