Definition: '.zshrc' refers to a file in Unix-like operating systems that contains shell configuration options, often used by .bash files to define how the shell behaves when running commands. The 'z' symbolizes "zsh" or "ZSH", indicating this is a custom shell script or command for ZSH environment. Detailed definitions include: 1. '.zshrc': Defines default shell settings. 2. 'config': Specifies options like encoding, echo, etc., used by .bash and other bash-like shells. These can be used to customize the behavior of shell scripts within your Bash shell environment.