Noun:
1: canis familiaris, dog, 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: frump, dog 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, bounder, blackguard, cad, dog, hound someone who is morally reprehensible; "you dirty dog"
5: frank, wienerwurst, hot dog, hotdog, dog, weenie, frankfurter, wiener a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
6: click, detent, dog, pawl a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward
7: firedog, dog, andiron, dog-iron metal supports for logs in a fireplace; "the andirons were too hot to touch"
Verb:
1: give chase, trail, chase, dog, tag, track, go after, tail, chase after go after with the intent to catch; "The policeman chased the mugger down the alley"; "the dog chased the rabbit"