IPA: /ˌɪntərprəˈvɪnʃəl/
KK: /ɪntərprəˈvɪnʃəl/
Relating to or happening between different provinces.
The interprovincial train connects several major cities across the country.
Interprovincial → It is formed from "inter-" (meaning between) and "provincia" (from Latin, meaning province). The word describes something that occurs between or among different provinces.
Think of things happening 'between' ('inter-') different 'provinces' ('provincia') — that's what interprovincial means.