DOG ? n.

   1. A domesticated carnivorous mammal (Canis familiaris) related to the foxes and wolves and raised in a wide variety of breeds.
   2. Any of various carnivorous mammals of the family Canidae, such as the dingo.
   3. A male animal of the family Canidae, especially of the fox or a domesticated breed.
   4. Any of various other animals, such as the prairie dog.
   5. Informal.
         1. A person: You won, you lucky dog.
         2. A person regarded as contemptible: You stole my watch, you dog.
   6. Slang.
         1. A person regarded as unattractive or uninteresting.
         2. Something of inferior or low quality: “The President had read the speech to some of his friends and they told him it was a dog” (John P. Roche).
         3. An investment that produces a low return or a loss.
   7. dogs Slang. The feet.
   8. See andiron.
   9. Slang. A hot dog; a wiener.
  10. Any of various hooked or U-shaped metallic devices used for gripping or holding heavy objects.
  11. Astronomy. A sun dog.

adv.

Totally; completely. Often used in combination: dog-tired.
tr.v., dogged, dog·ging, dogs.

   1. To track or trail persistently: “A stranger then is still dogging us” (Arthur Conan Doyle).
   2. To hold or fasten with a mechanical device: “Watertight doors and hatches were dropped into place and dogged down to give the ship full watertight integrity” (Tom Clancy).