interchange (
http://definr.com/interchange)
n 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 interchanging or
reciprocating [syn:
reciprocation,
give-and-take]
3: reciprocal transfer of equivalent sums of money especially
the currencies of different countries: "he earns his
living from the interchange of currency" [syn:
exchange]
v 1: give to, and receive from, one another; "Would you change
places with me?" "We have been exchanging letters for a
year" [syn:
exchange,
change]
2: cause to change places, as of parts, for example [syn:
counterchange,
transpose]
3: reverse, as of direction or attitude [syn:
switch,
alternate,
flip,
flip-flop]