1 a : a substance or preparation used in treating disease b : something that affects well-being

b : the branch of medicine concerned with the nonsurgical treatment of disease

3 : a substance (such as a drug or potion) used to treat something other than disease

4 : an object held in traditional American Indian belief to give control over natural or magical forces; also : magical power or a magical rite

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Medicine | Definition of Medicine by Merriam-Webster