Salina hugged her robe closer to her. It was very, very cold. She heard the professor ask a rather simple question. Or at least, it should be.

'What is a charm?'

After a few moments of thought, she raised her hand and said, "A charm is any spell that alters the nature of an object, causing it to act abnormally without changing its appearance. A spell that changes an objects appearance would be Transfiguration."