regional meaning
EN
[ˈɹiːdʒənəl] 
US FR régional 
- NounPLregionalsPREré-
- Adjective
- Of, or pertaining to, a specific region or district.
- Of, or pertaining to, a large geographic region.
- Of, or pertaining to, one part of the body.
- (Australia) Of a state or other geographic area, those parts which are not metropolitan, but are somewhat densely populated and usually contain a number of significant towns.
- Of, or pertaining to, a specific region or district.
- More Examples
- Used in the Middle of Sentence
- These are not minor issues because the regional extinctions of small mammals are a widespread phenomenon in southern South America and have involved several sigmodontine and caviomorph rodent species.
- The three AD cases showed distinct differences in regional THK5117 binding that were also observed in tau immunohistopathology as well as in clinical presentation.
- The regional climate is humid mesothermal, with a hot summer and well distributed rainfall throughout the year (Cfa in Köppen-Geiser’s classification [32 ]).
- Used in the Middle of Sentence
Definition of regional in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Uncomparable adjectives
- Uncomparable adjectives
- Nouns
- Countable nouns
- Countable nouns
- Adjectives
- en regionalism
- en regionals
- en regionally
- en regionalist
- en regionalise
Source: Wiktionary
Grammatically, this word "regional" is an adjective, more specifically, an uncomparable adjective. It's also a noun, more specifically, a countable noun.