An umbrella is an object which you use to protect yourself from the rain or hot sun. It consists of a long stick with a folding frame covered in cloth.
双语例句
例：
Harry held an umbrella over Denise.
哈里为丹尼斯撑着伞。
2.?[SING 单数型名词] 总组织 , 总称
Umbrella is used to refer to a single group or description that includes a lot of different organizations or ideas.
双语例句
例：
The country's blood banks are under the umbrella of the American Red Cross.