INTERCHANGE

I. verb Etymology: Middle English entrechaungen, from Anglo-French *entrechanger, from entre- inter- + changer to change Date: 14th century transitive verb to put each of (two things) in the place of the other, exchange , intransitive verb to change places mutually, ~r noun II. noun Date: 15th century the act, process, or an instance of interchanging ; exchange , a junction of two or more highways by a system of separate levels that permit traffic to pass from one to another without the crossing of traffic streams