'Shim' definitions:

Definition of 'shim'

From: WordNet
noun
A thin wedge of material (wood or metal or stone) for driving into crevices

Definition of 'Shim'

From: GCIDE
  • Shim \Shim\, n.
  • 1. A kind of shallow plow used in tillage to break the ground, and clear it of weeds. [1913 Webster]
  • 2. (Mach.) A thin piece of metal placed between two parts to make a fit. [1913 Webster]