With the October ’18 release, Dynamics 365 Business Central is available in the cloud, on-premises, and in hybrid deployments.
Business Central on-premises availability
Business Central gets an on-premises deployment option that serves as a successor to Dynamics NAV. In other words, rather than a new version number for Dynamics NAV, customers can get Business Central on-premises.
Check following links
Overview of Dynamics 365 Business Central October ’18 release
Summary of what’s new in Dynamics 365 Business Central
Ammolh Saallvi Blog 