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. (Holder) Sweet interchange Of hill and valley, rivers, woods, and plains. (Milton)
Origin: cf. OF. Entrechange.