The story
From outer + change by analogy with interchange.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A connection between two stations within walking distance of each other but which are not physically connected; used especially where a journey involving such a connection can be done on a single ticket. Full definition →
From outer + change by analogy with interchange.
Etymology from Wiktionary, CC BY-SA 4.0.