A particular setup is a particular system or way of organizing something.
双语例句
例：
It appears to be an idyllic domestic setup.
这种家庭形式似乎是田园式的。
2.?[C 可数名词] 圈套 , 陷阱
If you describe a situation as a setup, you mean that people have planned it in order to deceive you or to make it look as if you have done something wrong.
双语例句
例：
He was asked to pick somebody up and bring them to a party, not realizing it was a setup.
他被叫去开车接人并送他们到一个聚会，当时他并没意识到那是个圈套。
3.?[SING 单数型名词] （电脑硬件或软件的）安装
The setup of computer hardware or software is the process of installing it and making it ready to use.
双语例句
例：
The worst part of the setup is the poor instruction manual.