Definition of: interchange

(in′tər·chānj′) v. ·changed, ·chang·ing v.t.
1. To put each of (two things) in the place of the other.
2. To give and receive in return, as gifts; exchange.
3. To alternate: to interchange work and rest.
—v.i.
4. To make an interchange.
—noun (in′tər·chānj′)
1. Exchange.
2. Alternation. See synonyms under INTERCOURSE. [<OF entrechangier <entre- between (<L inter-) +changier <LL cambiare exchange]
—in′ter·chang′er noun