kənˈtərm(ə)nəs, (ˈ)kän|-, -tə̄m- adjective
Etymology: Latin conterminus, from com- + terminus boundary — more at term
1.
a. : having a common boundary (as with another section or country) : bordering , adjacent
the side of Germany conterminous with France
Colorado and Utah are conterminous
b. of a boundary : common , coincident
states with a conterminous boundary
2. : coterminous
3. : enclosed within one common boundary
the 48 conterminous states of the U.S.
Synonyms: see adjacent