Noun:
1: dog, canis familiaris, domestic dog a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds; "the dog barked all night"
2: dog, frump a dull unattractive unpleasant girl or woman; "she got a reputation as a frump"; "she's a real dog"
3: dog informal term for a man; "you lucky dog"
4: heel, blackguard, dog, hound, cad, bounder someone who is morally reprehensible; "you dirty dog"
5: frankfurter, dog, wienerwurst, weenie, frank, hot dog, wiener, hotdog a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
6: detent, dog, pawl, click a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward
7: andiron, firedog, dog, dog-iron metal supports for logs in a fireplace; "the andirons were too hot to touch"
Verb:
1: trail, chase after, dog, tail, tag, go after, give chase, chase, track go after with the intent to catch; "The policeman chased the mugger down the alley"; "the dog chased the rabbit"