1.The act of mutually changing; the act of mutually giving and receiving; exchange; as, the interchange of civilities between two persons. "Interchange of kindnesses."
2.The mutual exchange of commodities between two persons or countries; barter; commerce.
3.Alternate succession; alternation; a mingling. "The interchanges of light and darkness." "Sweet interchange Of hill and valley, rivers, woods, and plains."
4.An intersection between highways, having two or more levels and a series of connecting roadways so that traffic on one highway may pass over or under the other highway without crossing through the line of traffic, and vehicles may pass from one highway to the other while traffic on both highways continues uninterrupted. A common interchange is the cloverleaf.
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