con·tig·u·ous 
/kənˈtɪgjəwəs/ adjective
/kənˈtɪgjəwəs/ adjective formal — used to describe things that touch each other or are immediately next to each other ▪ She's visited each of the 48 contiguous states in the U.S., but she hasn't been to Alaska or Hawaii yet. ▪ the mountains contiguous to/with our border
— con·ti·gu·i·ty /ˌkɑ:ntəˈgju:wəti/ noun [noncount]
▪ the contiguity of the lands
/ˌkɑ:ntəˈgju:wəti/ noun [noncount] ▪ the contiguity of the lands
