adj.
Pronunciation: k ə n- ' t ə r-m ə -n ə s, kän-
Function: adjective
Etymology: Latin conterminus, from com- + terminus boundary ― more at TERM
Date: 1631
1 : having a common boundary < conterminous countries>
2 : COTERMINOUS
3 : enclosed within one common boundary <the 48 conterminous states>
– con · ter · mi · nous · ly adverb