Real Dictionary

magic
uncountable noun: Magic is the power to use supernatural forces to make impossible things happen, such as making people disappear or controlling events in nature.
uncountable noun: You can use magic when you are referring to an event that is so wonderful, strange, or unexpected that it seems as if supernatural powers have caused it. You can also say that something happens as if by magic or like magic.

magic in American English
the use of spells, charms, and rituals in seeking or pretending to cause or control events or to govern certain natural or supernatural forces; occultism
adjective: employed in magic
noun: the art of producing illusions as entertainment by the use of sleight of hand, deceptive devices, etc.; legerdemain; conjuring

magic in British English
noun: the art that, by use of spells, supposedly invokes supernatural powers to influence events; sorcery