Definition of hillsboro:
(n) :
A city, the county seat of Washington County, Oregon; named for early settler and Oregon politician David Hill.
(n) :
A city, the county seat of Montgomery County, Illinois; perhaps named for the area's hilly terrain, or for Hillsborough, North Carolina.
(n) :
A town in Alabama.
(n) :
A city, the county seat of Traill County, North Dakota; named for Canadian-American railroad official James J. Hill.
(n) :
A city, the county seat of Hill County, Texas; named for its county.
(n) :
A town in Fountain County, Indiana; named for the area's hilly terrain.