What is the meaning of Shim?

A wedge.

A thin piece of material, sometimes tapered, used for alignment or support.

A small library that transparently intercepts and modifies calls to an API, usually for compatibility purposes.

A kind of shallowly cutting plow used in tillage to break the ground and clear it of weeds.

A small metal device used to pick open a lock.

A thin device inserted into a card reader by a criminal to facilitate fraud.

To fit one or more shims to a piece of machinery or other assembly; to adjust (something) by using shims.

To adjust the homogeneity of a magnetic field (after the mechanical devices once used for the purpose).

To intercept and modify calls to (an API), usually for compatibility purposes.

To attack a point-of-sale card reader with a shim.

A transsexual person, especially a trans woman; a drag queen or transvestite.

A person characterised by both male and female traits, or by ambiguous male-female traits; a hermaphrodite.

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pants

Source: wiktionary.org