The word "between" is a preposition that indicates a position or location that separates two things, or it can refer to a relationship or interaction occurring among two or more entities. It signifies being in the middle of, or in a state of connection, interaction, or comparison.
The word "between" originates from Old English "betweonum," which means "in the midst of two." It is derived from the prefix "be-" meaning "by" or "near," and "tween," which is a variation of "two."