State of sorrow over the death or departure of a loved one WordNet 3.0 & Open English WordNet

Mourning is the expression of an experience that is the consequence of an event in life involving loss, causing grief, occurring as a result of someone's death, specifically someone who was loved, although loss from death is not exclusively the cause of all experience of grief. Wikipedia

Grief over someone's death. Wikipedia Disambiguation

State of emotions of a person to whom something irreversible happened that leads to a feeling of sadness or regret; most often occurring e.g. after a beloved one died, or a long relationship split up Wikidata

The state of emotions of a person to whom something irreversible happened that leads to a feeling of sadness or regret; most often occurring e.g. after a beloved one died, or a long relationship split up. OmegaWiki

The state of being bereaved; deprivation; especially the loss of a relative by death. Wiktionary