$ ./define.sh linux -n 3

1. an open-source version of the UNIX operating system

2. Linux (commonly in English, also , ) is a generic term referring to
Unix-like graphical user interface (GUI) based computer operating
systems based on the Linux kernel. ...

3. The Linux kernel is an operating system kernel used by the Linux
family of Unix-like operating systems. It is one of the most
prominent examples of free and open source software.