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Definition of Shim
1. Noun. A thin wedge of material (wood or metal or stone) for driving into crevices.
Generic synonyms: Wedge
Definition of Shim
1. n. A kind of shallow plow used in tillage to break the ground, and clear it of weeds.
Definition of Shim
1. to fill out or level by inserting a thin wedge [v SHIMMED, SHIMMING, SHIMS]
Medical Definition of Shim
1. In magnetic resonance imaging, fine adjustment of the magnetic field to improve uniformity; derived from its use in carpentry. (05 Mar 2000)