1. (n.)dog a domesticated canid, Canis familiaris, bred in many varieties.
2. dog any carnivore of the dog family Canidae, characterized in the wild state by a long muzzle, erect ears, and a long bushy tail; canid.
3. dog the male of such an animal.
4. dog a despicable man or youth.
5. dog a fellow in general: a lucky dog.
6. dog Slang. feet.
7. dog Slang.
8. dog something worthless or of extremely poor quality.
9. dog an utter failure; flop.
10. dog Slang. an unattractive person.
11. dog Slang.
12. dog (cap.) either of two constellations, Canis Major or Canis Minor.
13. dog any of various mechanical devices, as for gripping or holding something.
14. dog a projection on a moving part for moving steadily or for tripping another part with which it engages.
15. (v.t.)dog to follow or track like a dog, esp. with hostile intent; hound.
16. dog to drive or chase with a dog or dogs.
17. dog to do something perfunctorily or not at all.
Definition of 'DOG'
Princeton's WordNet
1. (noun)dog, domestic dog, Canis familiaris a member of the genusCanis (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. (noun)frump, dog a dull unattractive unpleasant girl or woman "she got a reputation as a frump"; "she's a real dog"
3. (noun)dog informal term for a man "you lucky dog"
4. (noun)cad, bounder, blackguard, dog, hound, heel someone who is morally reprehensible "you dirty dog"
5. (noun)frank, frankfurter, hotdog, hot dog, dog, wiener, wienerwurst, weenie a smooth-textured sausage of minced beef or pork usually smoked; often served on a breadroll
6. (noun)pawl, detent, click, dog a hinged catch that fits into a notch of a ratchet to move a wheelforward or prevent it from moving backward
7. (verb)andiron, firedog, dog, dog-iron metal supports for logs in a fireplace "the andirons were too hot to touch"
8. (verb)chase, chase after, trail, tail, tag, give chase, dog, go after, track go after with the intent to catch "The policeman chased the mugger down the alley"; "the dog chased the rabbit"
3. (noun)DOG a fellow; -- used humorously or contemptuously; as, a sly dog; a lazy dog
4. (noun)DOG one of the two constellations, CanisMajor and Canis Minor, or the Greater Dog and the Lesser Dog. CanisMajor contains the Dog Star (Sirius)
9. (verb)DOG to hunt or tracklike a hound; to follow insidiously or indefatigably; to chase with a dog or dogs; to worry, as if by dogs; to hound with importunity
Definitions of DOG 
Afrikaans: hond
Arabic: كَلْب
Bulgarian: куче
Brazilian: cão
Czech: pes
German: der Hund
Danish: hund
Greek: σκύλος
Spanish: perro
Estonian: koer
Farsi: سگ
Finnish: koira
French: chien
Hebrew: כֶּלֶב
Hindi: कुत्ता
Croatian: pas
Hungarian: kutya
Indonesian: anjing
Icelandic: hundur
Italian: cane, cagna
Japanese: 犬
Korean: 개
Lithuanian: šuo
Latvian: suns
Malay: anjing
Dutch: hond
Norwegian: hund
Polish: pies
Persian: سگ
Pashto: سپی
Portuguese: cão
Romanian: câine
Russian: собака
Slovak: pes
Slovenian: pes
Serbian: pas
Swedish: hund
Thai: สุนัข
Turkish: kopek, it
Taiwanese: 狗
Ukrainian: собака
Urdu: کتّا
Vietnamese: con chó
Chinese: 狗
