the mother of your father or mother （外）祖母；奶奶；姥姥；外婆 I always loved going to visit my grandmother. 我总是喜欢去看望我的祖母。
Idioms
teach your grandmother to suck eggs
- (British English, informal)
to tell or show somebody how to do something that they can already do well, and probably better than you can 教奶奶嘬鸡蛋；在能人面前逞强；班门弄斧