mourningPronunciation: /ˈmɔːnɪŋ/Translate mourning | into French | into German | into Italian | into Spanish Definition of mourning noun [mass noun] the expression of sorrow for someone’s death:she’s still in mourning after the death of her husband black clothes worn as an expression of sorrow when someone dies: if he dies, she’ll put on mourning but she won’t crymourning in other Oxford dictionaries Definition of mourning in the US English dictionary