Emily was quite thrilled to receive the unexpected news that she had been accepted into the summer arts program. She had dreamed of participating in such a prestigious event, where talented young artists from all over the country came together to learn and showcase their skills. The program promised to be challenging, but Emily was determined to excel. She felt a sense of exhilaration wash over her as she began to imagine the possibilities that awaited her.
In this context, the word 'exhilaration' is used to express Emily's feelings. What does 'exhilaration' mean?