1.(Canis familiaris)犬；狗
Outside, a dog was barking.外面有条狗在叫。
The dog growled again.那条狗又咆哮起来。
Have you got a dog?你养狗了吗?
2.(Canid)犬科其他动物(如澳洲野犬、丛林狼)
3.(male dog)公狗；犬科雄性
Is this a dog or a bitch?这是只公狗还是母狗？
4.(device)止动器；棘爪
5.<非正式>(man or boy)家伙；小伙子
You lucky dog!你真是个幸运儿！
6.<非正式,贬>(unpleasant man or boy)讨厌的人；卑鄙小人；无耻之徒
7.<非正式>(male friend)(称呼语)男性朋友
8.<俚,贬>(unattractive girl or woman)丑女人；无趣的女人(或姑娘)
How can you go out with her? She's a real dog.你怎么能和她约会呢？她一点也不好看。
9.<美,加拿大,非正式>(inferior thing)低级品
It's a real dog.真是个次品。
10.(phenomenon)幻日；假日；雾虹
halo arcs passing through each sun dog穿过每个幻日的晕弧
11.a dog's chance
(no chance)无机会；毫无希望
They've got a dog's chance of winning.他们根本没希望赢。