deep mourning

Deep mourning is the most intense period of grief following a death, traditionally observed for close family members such as a spouse or parent.

Historically, it referred specifically to the first phase of formal mourning when the bereaved wore entirely black clothing and withdrew from social activities.

The term also describes the distinctive black attire itself—heavy crepe, veils, and unadorned garments—that signaled this status to the community.

She remained in deep mourning for a full year after her husband's death.