1 a large female animal that is kept on farms to produce milk 母牛;乳牛:
to milk a cow挤牛奶a herd of cows一群母牛
Cow is often used for both male and female animals. The special word for a male is bull. A male that cannot produce any young and which was used in past times for pulling heavy loads is an ox. A young cow is a calf. A number of cows together can be called cattle. Look at the note at meat. cow常用以兼指公牛及母牛。bull特指公牛。不会生育、过去用来拉车的公牛叫做ox。小牛叫calf。牛群称cattle。参看meat的注释。
2 the adult female of certain large animals, for example elephants 某些大型动物的雌性(如母象)