0 to make someone have strong feelings of shock or of disapproval:
1 to cause someone to be extremely upset or shocked:
I was appalled by the condition of our facilities, especially the dirty locker room.
He witnessed some appalling acts of barbarism during the war.
Conditions in the prison are said to be appalling.
Your table manners are appalling - don't you know how to use a knife and fork?
After her appalling behavior, we had no option but to dismiss her.
The standard of cleanliness in some of these restaurants is frankly appalling.
Emissaries of death, some come boldly to appall us; others flaunt their lost lives only to lament.
Such cases, where not only the opinions of the experts but also their definitions, observations, and experimental data were flatly contradictory, were frequent enough to appall the courts.
Is that not quite appall- ing, and will he kindly ask the local postmaster here, who will confirm that fact?
