This glossary defines twelve specific types of grief and loss that grief researchers have identified over the past fifty years. Each entry explains what the type means, who named it, how it differs from ordinary bereavement, and why its label matters for validation and treatment. Most people think grief is one thing: the sadness after someone dies. But grief scholars Pauline Boss, Kenneth Doka, Holly Prigerson, J. William Worden, Robert Neimeyer, and George Bonanno have mapped at least a dozen distinct forms, each with its own trajectory and intervention needs. Naming your grief is the first step toward treating it well. The DSM-5-TR added Prolonged Grief Disorder in 2022, acknowledging that some grief persists and impairs functioning beyond what ordinary mourning involves. Mary-Frances O'Connor's brain imaging research at the University of Arizona shows that grief activates the same reward circuits as love, which is why the absent person keeps feeling present. Grief is not depression; George Bonanno's resilience research shows most people cope well, but those who do not often have specific forms like ambiguous loss or disenfranchised grief that standard support fails to address. Use this glossary to find your category, validate your experience, and point your therapist toward the right framework.

1. What Is Ambiguous Loss?

Ambiguous loss was named by Pauline Boss at the University of Minnesota in 1999. It describes grief with no closure: a missing person, a loved one with dementia, an estranged family member, an immigrant's lost homeland. The loss is real but the loved one is psychologically present or physically present but psychologically gone. Boss called it the most stressful kind of loss. It matters because there is no funeral, no ritual, no permission to mourn. Citation: Boss, Ambiguous Loss (1999).

2. What Is Anticipatory Grief?

Anticipatory grief is mourning that begins before the loss occurs, named by Erich Lindemann in 1944 observing World War II families. It is common in terminal illness and dementia caregiving. Theresa Rando expanded the concept in the 1980s, noting that anticipatory grief does not reduce post-death grief. It matters because caregivers often feel they should not grieve someone still alive. Citation: Rando, Loss and Anticipatory Grief (1986).

3. What Is Disenfranchised Grief?

Disenfranchised grief was named by Kenneth Doka in 1989 for grief that is not socially recognized, openly acknowledged, or publicly mourned. Examples: the death of an ex-spouse, a pet, an abusive parent, an unborn child, a celebrity, an affair partner. Doka argued that unrecognized grief does not heal. It matters because survivors often feel they have no right to their sorrow. Citation: Doka, Disenfranchised Grief (1989).

4. What Is Complicated Grief?

Complicated grief (also called prolonged grief disorder) is grief that remains intense and impairing beyond twelve months. Researcher Holly Prigerson developed the diagnostic criteria. About 7 to 10 percent of bereaved adults develop it. Katherine Shear's complicated grief treatment (CGT) is evidence-based. It matters because ordinary grief therapy does not work for it. Citation: Shear et al., JAMA (2005).

5. What Is Prolonged Grief Disorder?

Prolonged Grief Disorder (PGD) entered DSM-5-TR in 2022 and ICD-11 in 2018. It requires persistent longing for the deceased or preoccupation with them, plus impairment, for at least twelve months (DSM) or six months (ICD). It is not a pathologization of normal grief but recognition of a treatable subset. Citation: American Psychiatric Association, DSM-5-TR (2022).

6. What Is Secondary Loss?

Secondary loss describes the cascading losses that follow a primary loss: the social network built around a spouse, financial stability, sense of identity, holiday traditions, future plans. Therese Rando wrote extensively about it. It matters because survivors often feel they should be grieving only the person, when they are actually grieving dozens of entwined losses.

7. What Is Shadow Loss?

Shadow loss is a term popularized by therapist Dr. Christina Rasmussen for the non-death losses that carry unacknowledged grief: divorce, job loss, infertility, miscarriage, chronic illness, estrangement, lost dreams. Shadow losses are often more painful than deaths precisely because they are unrecognized. The concept overlaps with disenfranchised grief and ambiguous loss.

8. What Is Chronic Grief?

Chronic grief is a type of complicated grief where the acute phase never subsides and the bereaved remains frozen in early mourning. George Bonanno's resilience research found chronic grief affects roughly 15 percent of bereaved adults. It differs from prolonged grief disorder in historical usage but the two overlap. It matters because the survivor often needs active intervention rather than time. Citation: Bonanno, The Other Side of Sadness (2009).

9. What Is Delayed Grief?

Delayed grief is mourning that is suppressed at the time of loss and erupts later, sometimes years afterward, often triggered by a new loss. It is recognized in the grief literature going back to Lindemann (1944). Survivors of multiple traumas or caregivers too busy to mourn often experience it. It matters because delayed grief often looks like unrelated depression or anxiety.

10. What Is Inhibited Grief?

Inhibited grief is the partial suppression of normal mourning, often showing up as unexplained physical symptoms, rigid functioning, or emotional numbness. Colin Murray Parkes wrote about it in his landmark Bereavement (1972). It differs from healthy resilience because the body carries what the mind refuses. It matters because somatic symptoms can be the only clue. Citation: Parkes, Bereavement (1972).

11. What Is Masked Grief?

Masked grief is grief that appears as other symptoms (back pain, substance abuse, irritability) rather than sadness or tears. Bowlby described it as an inability to integrate the loss. It is common in cultures that discourage male grief expression. It matters because treating only the mask (addiction, physical pain) without the grief underneath leaves the root untouched.

12. What Is Traumatic Grief?

Traumatic grief is grief combined with trauma, typically when the death was sudden, violent, or witnessed. It combines PTSD symptoms (flashbacks, hyperarousal) with grief symptoms (yearning, preoccupation). William Worden and Phyllis Silverman studied it in bereaved children. It matters because it requires both trauma therapy and grief therapy; either alone is insufficient. Citation: Rando, Treatment of Complicated Mourning (1993). Mary-Frances O'Connor's brain imaging research at the University of Arizona, published in her 2022 book The Grieving Brain, shows that grief is a form of learning: the brain must update its map of the world to accept that the loved one is not coming back, and this takes time. If your grief falls into one of these twelve categories, you are not broken, and there is research-backed language and treatment for what you are living. Find a grief therapist trained in the specific framework that fits.