butt in WordNet English dictionary

1. lie adjacent to another or share a boundary
   "Canada adjoins the U.S."; "England marches with Scotland"
   border  adjoin  edge  abut  march  butt  butt against  butt on 
   
2. to strike, thrust or shove against
   "He butted his sister out of the way"; "The goat butted the hiker with his horns"
   butt  bunt 
   
3. place end to end without overlapping
   "The frames must be butted at the joints"
   butt 
   

1. 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 
   
2. thick end of the handle
   butt  butt end 
   
3. the small unused part of something (especially the end of a cigarette that is left after smoking)
   butt  stub 
   
4. a large cask (especially one holding a volume equivalent to 2 hogsheads or 126 gallons)
   butt 
   
5. sports equipment consisting of an object set up for a marksman or archer to aim at
   target  butt 
   
6. finely ground tobacco wrapped in paper; for smoking
   cigarette  cigaret  coffin nail  butt  fag 
   
7. a joint made by fastening ends together without overlapping
   butt joint  butt 
   
8. a victim of ridicule or pranks
   butt  goat  laughingstock  stooge 
   
9. the part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots
   butt