1.AdjectiveOf, or pertaining to, a specific region or district.
"regional playoffs"
2.AdjectiveOf, or pertaining to, a large geographic region.
"regional rainfall patterns"
3.AdjectiveOf, or pertaining to, one part of the body.
"regional nerve block"
4.AdjectiveOf a state or other geographic area, denoting those parts which are not metropolitan, but are somewhat densely populated and usually contain a number of significant towns.
5.NounAn entity or event with scope limited to a single region.