What is the meaning of Shin?

The front part of the leg below the knee; the front edge of the shin bone: Shinbone on Wikipedia.Wikipedia

A fishplate for a railway

To climb a mast, tree, rope, or the like, by embracing it alternately with the arms and legs, without help of steps, spurs, or the like.

To strike with the shin.

To run about borrowing money hastily and temporarily, as when trying to make a payment.

The twenty-first letter of many Semitic alphabets/abjads (Phoenician, Aramaic, Hebrew, Syriac, Arabic and others): Shin (letter) on Wikipedia.Wikipedia

H-system spelling of ŝin

shin (letter of the Arabic alphabet)

Lenited form of sin.

Rōmaji transcription of しん

spear

war

(a) dog

we, us

Lenited form of sin.

Source: wiktionary.org