Medical Definition of grief
: deep and poignant emotional distress caused by or as if by bereavement <Although, there is no consensus on the defining features that would distinguish normal and pathological grief, it is generally accepted that grief becomes pathological when the reactions are excessive, prolonged, or unresolved.—Jaye Wald and Rosemarie Alvaro, The Journal of Rehabilitation, 1 Oct. 2004>; also : a cause of such suffering
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