A witch is a person with magical powers. Most towns have a spooky old woman with a lot of cats who all the neighborhood kids suspect of being a witch.
The classic picture of a witch is a woman dressed in black with a tall, pointy hat, a broom, and an ugly face — this kind of witch is a popular Halloween costume. Another kind of witch is a serious believer in the religion called Wicca. The word witch is also used to describe someone who's old and unattractive — or, conversely, a young enchantress, a girl capable of bewitching a man.