[ shim ]
/ ʃɪm /


a thin slip or wedge of metal, wood, etc., for driving into crevices, as between machine parts to compensate for wear, or beneath bedplates, large stones, etc., to level them.

verb (used with object), shimmed, shim·ming.

to fill out or bring to a level by inserting a shim or shims.

Origin of shim

First recorded in 1715–25; origin uncertain Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for shimmed

/ (ʃɪm) /


a thin packing strip or washer often used with a number of similar washers or strips to adjust a clearance for gears, etc
physics a thin strip of magnetic material, such as soft iron, used to adjust a magnetic field

verb shims, shimming or shimmed

(tr) to modify a load, clearance, or magnetic field by the use of shims

Word Origin for shim

C18: origin unknown
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012