(plural routing numbers)
- (US) An eight or nine digit number used by a banking institution to designate a certain geographic area used to direct and sort inquiries and transactions to the correct district, usually shown at the bottom left of a check
- Mom, what is a routing number? Why do I have to use some bank number instead of plastic? That would be so much easier!
- My cashiers always get confused finding the right check, account, and routing numbers because customers seldom pay with checks