What is aghast?

"Aghast" is an adjective used to describe a feeling of shock, amazement, or horror, typically in response to something unexpected or frightening. When someone is aghast, they are often so taken aback that they might momentarily be at a loss for words or have a strong emotional reaction, such as gasping or staring in disbelief. The term suggests a level of surprise mixed with dismay or alarm. It is often used in literature and conversation to convey a vivid emotional response to an event or revelation.