adjoin 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. attach or add
   "I adjoin a copy of your my lawyer's letter"
   adjoin 
   
3. be in direct physical contact with; make contact
   "The two buildings touch"; "Their hands touched"; "The wire must not contact the metal cover"; "The surfaces contact at this point"
   touch  adjoin  meet  contact