Between

Be·tween

prep.

In the space which separates; betwixt; as, New York is between Boston and Philadelphia.
Used in expressing motion from one body or place to another; from one to another of two.
If things should go so between them.
— Bacon.
Belonging in common to two; shared by both.
Castor and Pollux with only one soul between them.
— Locke.
Belonging to, or participated in by, two, and involving reciprocal action or affecting their mutual relation; as, opposition between science and religion.
An intestine struggle, open or secret, between authority and liberty.
— Hume.
With relation to two, as involved in an act or attribute of which another is the agent or subject; as, to judge between or to choose between courses; to distinguish between you and me; to mediate between nations.
In intermediate relation to, in respect to time, quantity, or degree; as, between nine and ten o'clock.
I . . . hope that between public business, improving studies, and domestic pleasures, neither melancholy nor caprice will find any place for entrance.
— Johnson.

Between decks: the space, or in the space, between the decks of a vessel.
Between ourselves: in confidence; with the understanding that the matter is not to be communicated to others.