To affect or effect by conjuration; to call forth or send away by magic arts; to excite or alter, as if by magic or by the aid of supernatural powers.

To practice magical arts; to use the tricks of a conjurer; to juggle; to charm.

(1) Transitive and intransitive verb invoke supposed supernatural forces: to call upon or order a supposed supernatural force or being by reciting a spell He was struck dumb by the very demons he was conjuring.(2) Transitive verb influence with spell: to change or influence something by reciting a spell or invocation.

evoke or call forth, with or as if by magic; "raise the specter of unemployment"; "he conjured wild birds in the air"; "stir a disturbance"; "call down the spirits from the mountain"

normally associated with black magic, to conjure is to call forth a spirit with black magic.