A woman claiming or popularly believed to possess magical powers and practice sorcery. A believer or follower of Wicca; a Wiccan. A hag. A woman considered to be spiteful or overbearing. Informal A woman or girl considered bewitching. One particularly skilled or competent at one's craft: "A witch of a writer, [she] is capable of developing an intensity that verges on ferocity\u201d ( Peter S. Prescott). To work or cast a spell on; bewitch. To cause, bring, or effect by witchcraft. To use a divining rod to find underground water or minerals; dowse.