n.悲痛；孝服；服喪期

He wore crape as a sign of mourning. 他戴著黑紗表示哀悼。

The mourning hall was filled with a solemn silence. 追悼會(huì)會(huì)場(chǎng)莊嚴(yán)肅穆。

It was a day of national mourning with flags flying at half-mast everwhere. 這是一個(gè)全國(guó)哀悼的日子，到處都下了半旗。

When grandmother died they went into (ie started to wear) mourning. 祖母逝世時(shí)他們開始服喪。