What is In a while?
In a while definition and meaning on Dictionary terms:
in fact; in reality; in truth; truly (used for emphasis, to confirm and amplify a previous statement, to indicate a concession or admission, or, interrogatively, to obtain confirmation): Indeed, it did rain as hard as predicted. Did you indeed finish the work?
(used as an expression of surprise, incredulity, irony, etc.): Indeed! I can scarcely believe it.