Definition of grief, gender differences and religious and cultural differences in dealing with death and grief

What does it mean to feel grief when a loved one passes away? Is it the tears that one sheds after the loss of a person that define the grief? Is it the stabbing pain and the sudden surge of anger that one feels due to the loved one having been prematurely torn away from one's daily life? Or is it possibly the realization that one will never see the closed one again? What it means to grieve seems to be a rather simple, almost trivial question. However, it can hardly be answered with just a short definition. After all, grief may include all of the above listed emotions, thoughts, and behaviours, or in turn only include some or even none of the mentioned aspects. As is commonly known, each person grieves in their own way. While one person might be overcome with deep distress after the loss of a beloved friend or family member, another might happily revel in the precious memories of the deceased, albeit perhaps with a tinge of wistfulness.