tail in WordNet English dictionary

1. the rear part of a ship
   stern  after part  quarter  poop  tail 
   
2. the fleshy part of the human body that you sit on
   "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"
   buttocks  nates  arse  butt  backside  bum  buns  can  fundament  hindquarters  hind end  keister  posterior  prat  rear  rear end  rump  stern  seat  tail  tail end  tooshie  tush  bottom  behind  derriere  fanny  ass 
   
3. the rear part of an aircraft
   tail  tail assembly  empennage 
   
4. the time of the last part of something
   "the fag end of this crisis-ridden century"; "the tail of the storm"
   fag end  tail  tail end 
   
5. a spy employed to follow someone and report their movements
   tail  shadow  shadower 
   
6. the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body
   tail 
   
7. (usually plural) the reverse side of a coin that does not bear the representation of a person's head
   tail 
   
8. any projection that resembles the tail of an animal
   tail  tail end 
   

1. remove or shorten the tail of an animal
   dock  tail  bob 
   
2. 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 
   
3. remove the stalk of fruits or berries
   tail