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)
7. (noun)DOG an iron with fangs fastening a log in a saw pit, or on the carriage of a sawmill
8. (noun)DOG a piece in machineryacting as a catch or clutch; especially, the carrier of a lathe, also, an adjustable stop to change motion, as in a machinetool
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
Definition of DOG 
