adjacent in WordNet English dictionary

1. nearest in space or position; immediately adjoining without intervening space
   "had adjacent rooms"; "in the next room"; "the person sitting next to me"; "our rooms were side by side"
   adjacent  next  side by side 
   
2. having a common boundary or edge; abutting; touching
   "Rhode Island has two bordering states; Massachusetts and Conncecticut"; "the side of Germany conterminous with France"; "Utah and the contiguous state of Idaho"; "neighboring cities"
   adjacent  conterminous  contiguous  neighboring 
   
3. near or close to but not necessarily touching
   "lands adjacent to the mountains"; "New York and adjacent cities"
   adjacent