An unannounced change of policy.
An unannounced visit by a relative.
Neither mentioned the late night phone call during Edith's nocturnal visit nor Cynthia's sudden, unannounced return.
These enjoyed the right of entering the presence unannounced, and possessed princely estates in the provinces.
Their unplanned, unannounced engagement had stretched on indistinctly until Carmen began to silently question her lack of enthusiasm.
Unannounced checks will help you keep track of what your teen is really chatting about.
She shouldn't have walked in unannounced - but who would have thought Josh would be doing something like that?