Webster’s Revised Unabridged Dictionary · 1913 Bushing Bush′ing, n. [See 4th Bush.] 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. ‹ Bushiness Bushless ›