WordWeb Online

1. A junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams
    
2. Mutual interaction; the activity of reciprocating or exchanging (especially information)
   - reciprocation, give-and-take
    
3. The act of changing one thing for another thing
   "there was an interchange of prisoners";
   - exchange
    
4. Reciprocal transfer of equivalent sums of money (especially the currencies of different countries)
   "he earns his living from the interchange of currency";
   - exchange

1. Put in the place of another; switch seemingly equivalent items
   "synonyms can be interchanged without changing the context's meaning";
   - substitute, replace, exchange, sub [informal]
    
2. Give to, and receive from, one another
   "We have been interchanging letters for a year";
   - exchange, change
    
3. Cause to change places
   "interchange this screw for one of a smaller size";
   - counterchange, transpose
    
4. Reverse (a direction, attitude, or course of action)
   - tack, switch, alternate, flip, flip-flop

Derived forms: interchanging, interchanges, interchanged

Type of: alter, change, change by reversal, commerce, commercialism, group action, interaction, junction, mercantilism, modify, reverse, transfer, turn

Part of: highway, main road

Encyclopedia: Interchange