What is Magick?
Witches often spell Magick with a K at the end to differentiate it from the illusion/sleight of hand/mirrors & redirection type entertainment magic.
What binds all of witchcraft together is the practice and belief in magick.
That still doesn't exactly clarify things because the term magic can also have many different definitions and individual meanings depending on the path & individual.
The dictionary definition of magic:
noun- "the power of apparently influencing the course of events by using mysterious or supernatural forces."
adjective - "used in magic or working by magic, having or apparently having supernatural powers."
verb - "move, change, or create by or as if by magic."
Definition of supernatural:
"(of a manifestation or event) attributed to some force beyond scientific understanding or the laws of nature"
to move, change or create
My definition of magic would be to manifest, create, direct, or inspire a change be it physical, mental, emotional, or worldly using intent and one or more sources: energy, ritual, tools, spirits, ancestors, Earth, the universe/stars/zodiac, or deity.
At the heart and soul of magic, it is all about using intent to manifest something.