[] knowledge of, or training in, the basic parts of a subject 基础知识；基础训练◆The course will give you a good grounding in advertising. 这门课程将为你打下扎实的广告基本功。
[, ]the act of keeping a plane on the ground or a ship in a port （飞机的）留地停飞；（船的）留港停航◆The airline collapsed, resulting in the grounding of its fleet for lack of cash. 这家航空公司倒闭导致飞机缺乏资金而停飞。