the end of something which is furthest from the front or the working end

the back end of the car swung round

the part of a computer system or application that is not directly accessed by the user, typically responsible for storing and manipulating data

the back end has three parts to it: server, application, and database

relating to the end of a project, process, or investment

many annuities have back-end surrender charges

relating to or denoting the part of a computer system or application that is not directly accessed by the user, typically responsible for storing and manipulating data

a back-end database server