INTERCHANGE (3)

In′ter‐change″ (?), n. [[Cf. OF. entrechange.]] 1. 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.” South.
2. 2. The mutual exchange of commodities between two persons or countries; barter; commerce. Howell.
3. 3. Alternate succession; alternation; a mingling.
The interchanges of light and darkness. Holder. Sweet interchange Of hill and valley, rivers, woods, and plains. Milton.