in mourning 服丧中
period of mourning 哀悼期
mourning clothes 丧服
deep mourning 深切哀悼
A: Why are you wearing black today?
A：你今天为什么穿黑色的衣服？
B: I am in mourning because my grandfather passed away.
B：因为我祖父去世了，我在服丧。
1) 表达对逝者的悲痛情感
2) 指死亡后的哀悼仪式或期间
3) 指通过特定服饰或行为表示哀悼
1. 哀悼；悲痛；服丧
noun
1. the expression of deep sorrow for someone who has died
Synonym: grief, sorrow, bereavement