Interchange (freight rail) definition

(1) Mutual interaction; the activity of reciprocating or exchanging (especially information)

(2) Reciprocal transfer of equivalent sums of money especially the currencies of different countries

"He earns his living from the interchange of currency"

(3) A junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams

(4) Reverse (a direction, attitude, or course of action)

(5) Cause to change places

"Interchange this screw for one of a smaller size"

(6) Give to, and receive from, one another

"Would you change places with me?"

"We have been exchanging letters for a year"