Merriam-Webster's Collegiate® Dictionary, 11th Edition
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, interchanger 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