cen ‧ tral ‧ is ‧ m /ˈsentrəlɪz ə m/ BrE AmE noun [uncountable]
[ Word Family: noun : CENTRE/CENTER , ↑ centralization ≠ ↑ decentralization , ↑ centralism , ↑ centrist ; adjective : ↑ central , ↑ centralized ≠ ↑ decentralized , CENTRED/CENTERED , ↑ centrist ; verb : CENTRE/CENTER , ↑ centralize ≠ ↑ decentralize ; adverb : ↑ centrally ]
a way of governing a country or controlling an organization in which one group has power and tells people in other places what to do