mourning
/ˈmɔːnɪŋ/noun
mass noun
1- the expression of deep sorrow for someone who has died, typically involving following certain conventions such as wearing black clothes服丧：
she's still in mourning after the death of her husband.
她仍在替亡夫服丧。
1.1
- black clothes worn as an expression of grief when someone dies黑色丧服。