(idiomatic) Used as a polite farewell to a visitor, inviting a return visit.
(idiomatic, informal) Could you repeat that? Repeat that please. a polite formula used when one has not heard or understood what has been said.
Origin of come-again
Possibly an ellipsis of "Could you come again with what you just said?" "Come again with what you just said."
An ellipsis of "Please come back for another visit"
Come-again Sentence Examples
She would come again when the battle settled to heal her people.
Turning southwards we come again to the Forbidden City, the central portion of which forms the imperial palace, where, in halls which for the magnificence of their proportions and barbaric splendour are probably not to be surpassed anywhere, the Son of Heaven holds his court.
And shall come again (in glory) to judge quick and dead.
And He shall come again to judge the quick and the dead, whose kingdom shall have no end.
Corps therefore will not come again into this narrative.