a.

1. 昏暗的；陰沉的
   That was a somber January day.

   那是一個陰沉的正月天。

2. 憂鬱的；悶悶不樂的
   He had a somber expression on his face.

   他面容憂鬱。

3. 嚴峻的
   His expression was somber as he listened to the report of the accident.

   他聽著關於事故的報告時，臉部表情嚴峻。

4. （顏色等）暗淡的，灰暗的；樸實無華的
   She was dressed in somber black.

   她穿一身灰黑色衣服。