1. having the same boundaries or extent in space, time, or meaning
Usage: formal
2. sharing a common boundary; adjacent
Usage: formal; geography

Examples

• The park’s boundaries are conterminous with the city limits.
• His term as mayor was conterminous with the economic boom.
• The two counties are conterminous along their eastern borders.
• The conterminous United States excludes Alaska and Hawaii.
• Her authority is conterminous with the department’s jurisdiction.
• The study period was conterminous with the academic year.