dog in WordNet English dictionary

1. metal supports for logs in a fireplace
   "the andirons were too hot to touch"
   andiron  firedog  dog  dog-iron 
   
2. someone who is morally reprehensible
   "you dirty dog"
   cad  bounder  blackguard  dog  hound  heel 
   
3. 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"
   dog  domestic dog  Canis familiaris 
   
4. a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward
   pawl  detent  click  dog 
   
5. a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
   frank  frankfurter  hotdog  hot dog  dog  wiener  wienerwurst  weenie 
   
6. informal term for a man
   "you lucky dog"
   dog 
   
7. a dull unattractive unpleasant girl or woman
   "she got a reputation as a frump"; "she's a real dog"
   frump  dog 
   

1. go after with the intent to catch
   "The policeman chased the mugger down the alley"; "the dog chased the rabbit"
   chase  chase after  trail  tail  tag  give chase  dog  go after  track