|1.||a thin packing strip or washer often used with a number of similar washers or strips to adjust a clearance for gears, etc|
|2.||physics a thin strip of magnetic material, such as soft iron, used to adjust a magnetic field|
|—vb , shims, shimming, shimmed|
|3.||(tr) to modify a load, clearance, or magnetic field by the use of shims|
|[C18: origin unknown]|
shimn. A small piece of data inserted in order to achieve a desired memory alignment or other addressing property. For example, the PDP-11 Unix linker, in split I&D (instructions and data) mode, inserts a two-byte shim at location 0 in data space so that no data object will have an address of 0 (and be confused with the C null pointer). See also loose bytes.