Definitions
1.verbTo fill with horror; to dismay."The evidence put forth at the court appalled most of the jury."
2.verbTo make pale; to blanch.
3.verbTo weaken; to reduce in strength
4.verbTo grow faint; to become weak; to become dismayed or discouraged.
5.verbTo lose flavour or become stale.
6.adjectiveHorrifying and astonishing."That was an appalling waste of money."
7.adjectiveExtremely bad; terrible