interchange

(noun) a junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams.

(noun) mutual interaction; the activity of reciprocating or exchanging (especially information). Synonyms: reciprocation, give-and-take.

(noun) the act of changing one thing for another thing. Synonyms: exchange. Examples: "Adam was promised immortality in exchange for his disobedience." "There was an interchange of prisoners."

(noun) reciprocal transfer of equivalent sums of money (especially the currencies of different countries). Synonyms: exchange. Examples: "He earns his living from the interchange of currency."

(verb) put in the place of another; switch seemingly equivalent items. Synonyms: substitute, replace, exchange. Examples: "The con artist replaced the original with a fake rembrandt." "Substitute regular milk with fat-free milk." "Synonyms can be interchanged without a changing the context's meaning."

(verb) give to, and receive from, one another. Synonyms: exchange, change. Examples: "Would you change places with me?." "We have been exchanging letters for a year."

(verb) cause to change places. Synonyms: counterchange, transpose. Examples: "Interchange this screw for one of a smaller size."

(verb) reverse (a direction, attitude, or course of action). Synonyms: tack, switch, alternate, flip, flip-flop.