"Feeding" someone means giving them food to eat.

Here are some example sentences:

She fed the baby a bottle of milk. (她给婴儿喂了一瓶牛奶。)
He fed the dog a bowl of dog food. (他给狗喂了一碗狗粮。)
The mother fed her children a healthy lunch. (母亲给孩子们做了一顿健康的午餐。)

The word "feed" comes from the Old Engpsh word "fēdan," which means "to give food to." It is used as a verb and can be used to describe the act of giving food to people, animals, or even plants. It is a common and widely used word in Engpsh.