set-up also set‧up
1 [countable usually singular]
the way that something is organized or arranged:
the traditional classroom set-up
2 [countable usually singular] informal
a dishonest plan that is intended to trick someone:
How do I know this isn't a set-up?
the act of organizing something, such as a business or a computer system:
The IT department will assist you with installation and setup.
several pieces of equipment that work together in a system:
'Do you use the school darkroom?' 'No, I've got my own setup at home.'