mourning UK /ˈmɔːnɪŋ/US /ˈmoɹnɪŋ/ noun5 •The act of expressing or feeling sorrow or regret; lamentation. •Specifically, the act of expressing or feeling sorrow regarding a death or loss.A blind bearing the monogram G.V.T. is pulled down over the waiting room window as if still in mourning for the passing of the railway. — 1941 •A social state or period that acknowledges a recent bereavement, which may involve social withdrawal, the observance of customs or rituals related to bereavement, etc. •The traditional clothes worn by those who mourn (in Western societies, typically coloured black).‘I'm bored. I can't go out anywhere because it's too soon and I have to wear this disgusting mourning.’ — 1992 •A drape or covering associated with mourning.The houses to their tops with black were spread, / And ev'n the pavements were with mourning hid. — 1700 formsmournings