from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. Could you repeat that? Repeat that please. a polite formula used when one has not heard or understood what has been said
- v. Used as a polite farewell to a visitor, inviting a return visit.
Possibly an ellipsis of "Could you come again with what you just said?" "Come again with what you just said." (Wiktionary)
An ellipsis of "Please come back for another visit" (Wiktionary)