Real Dictionary

witch
countable noun: A witch is someone who claims to have magic powers and to be able to use them for good or bad purposes.
countable noun: In fairy stories, a witch is a woman, usually an old woman, who has evil magic powers. Witches often wear a pointed black hat, and have a pet black cat.

witch in American English
a person, esp. a woman, having supernatural power as by a compact with the devil or evil spirits; sorceress
dowse2
to put a magic spell on; bewitch
adjective: of, pertaining to, or designed as protection against witches
intransitive verb: to prospect with a divining rod; dowse
noun: a person, now esp. a woman, who professes or is supposed to practice magic, esp. black magic or the black art; sorceress
transitive verb: to bring by or as by witchcraft

witch in British English 1
noun: historically, in mythology and fiction, a woman believed to practise magic or sorcery, esp black magic

witch in British English 2
noun: a flatfish, Pleuronectes (or Glyptocephalus) cynoglossus, of N Atlantic coastal waters, having a narrow greyish-brown body marked with tiny black spots: family Pleuronectidae (plaice, flounders, etc)

witch- in British English
prefix: having pliant branches