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: 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: blackguard, hound, heel, cad, bounder, dog someone who is morally reprehensible; "you dirty dog"
5: hotdog, hot dog, wienerwurst, wiener, dog, frank, frankfurter, weenie a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
6: detent, pawl, dog, click 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-iron, andiron, dog metal supports for logs in a fireplace; "the andirons were too hot to touch"
Verb:
1: track, chase after, tail, chase, dog, give chase, tag, go after, trail go after with the intent to catch; "The policeman chased the mugger down the alley"; "the dog chased the rabbit"