This article presents an existential framework for understanding loss and grief. Since not all experiences of loss lead to grief, I begin by exploring what constitutes grievable losses. The dominant approach in grief research has been to understand grief in terms of bereavement. In light of emerging discourses on living and non-death losses, this approach no longer seems tenable, and the contemporary debate requires an account of grievability that extends beyond bereavement. In response to this challenge, I propose a two-part (...) existential framework. The first part introduces mourning as a ground attunement, suggesting that our finitude is the basis for generalized experiences of loss. The second part posits that specific grievable losses reflect a loss of identity. To explain this, I introduce the concept of existential identity and four associated axes susceptible to loss. Lastly, I demonstrate how this framework can be used to analyze loss as complex existential experiences. (shrink)