noun
main city; major city
Refers to the principal city of a district, province, or region. Not as common as 主要都市, but used in formal or geographical contexts.
この県の主都は人口が最も多い市です。
The main city of this prefecture is the most populous city.
観光案内には、地域の主都が太字で示されている。
In the tourist guide, the main cities of the region are shown in bold.