interchange

Short definition from Wiktionary

Verb

1. 1
   to switch (each of two things)
2. 2
   to mutually give and receive (something); to exchange
3. 3
   to swap or change places
4. 4
   to alternate; to intermingle or vary
5. 5
   To act as or carry out an interchange (noun, senses 2, 3).

Noun

1. 1
   An act of interchanging.
2. 2
   A highway junction in which traffic may change from one road to another without crossing a stream of traffic.
3. 3
   A junction in which traffic may merge to enter or diverge to exit a limited-access highway to access a surface street, without crossing traffic on the main highway.
4. 4
   A connection between two or more lines, services or modes of transport; a station at which such a connection can be made.
5. 5
   A back-and-forth interaction; an exchange.