What is the meaning of Between?

In the position or interval that separates (two things), or intermediate in quantity or degree. (See Usage notes below.)

Done together or reciprocally.

Shared in confidence.

In transit from (one to the other, or connecting places).

Combined (by effort or ownership).

One of (representing a choice).

Taking together the combined effect of.

A kind of needle, shorter than a sharp, with a small rounded eye, used for making fine stitches on heavy fabrics.

BTW; by the way

Source: wiktionary.org