1. Connecting without a break; within a common boundary
   "the 48 conterminous states"
   - contiguous 
2. Having a common boundary or edge; abutting; touching
   "the side of Germany conterminous with France"
   - adjacent, contiguous, neighboring [US], neighbouring [Brit, Cdn] 
3. Being of equal extent or scope or duration
   - coextensive, coterminous

See also: commensurate, connected

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