Definitions
1.NounThe act of expressing or feeling sorrow or regret; lamentation.
2.NounSpecifically, the act of expressing or feeling sorrow regarding a death or loss.
3.NounA social state or period that acknowledges a recent bereavement, which may involve social withdrawal, the observance of customs or rituals related to bereavement, etc.
4.NounThe traditional clothes worn by those who mourn (in Western societies, typically coloured black).
5.NounA drape or covering associated with mourning.
6.Verbpresent participle and gerund of mourn