Webster's English Dictionary

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interchange

1. in.ter.change \.int-*r-'cha-nj\ vb [ME entrechaungen, fr. MF 
   entrechangier, fr. OF, fr. entre- i]nter- + changier to change 1: to put 
   each in the place of the other  2: EXCHANGE  : to change places mutually  - 
   in.ter.chang.er n
2. in.ter.change \'int-*r-.cha-nj\ n 1: the act, process, or an instance of 
   interchanging : EXCHANGE  2: a junction of two or more highways by a system 
   of separate levels that p ermit traffic to pass from one to another without 
   the crossing of traffic streams