a person in certain traditional societies who is believed to be able to communicate with the spirit world and who performs rituals, divination, and healing.

精霊界と交信し、儀式や占い・治療を行う人物（伝統社会の宗教的指導者）

a healer who uses traditional, often ritualistic, methods (herbal remedies, trance, spirit communication) rather than modern medical practices.

伝統的・儀式的な方法（薬草療法、トランス、霊との交信）で治療を行う治療者（現代医療とは別系統）

figurative: someone thought to have unusual insight, intuition, or influence (used metaphorically).

比喩的に、特異な洞察力・直観・影響力を持つと見なされる人物（比喩）