A redirection may refer to any of the following:
1. A redirection describes the process of sending a signal, data, or other information to an alternate location. Some examples of redirection are sending data intended for one drive to another drive or sending a user visiting a web page to another web page.
2. When referring to something malicious or when your browser or search is redirecting you to somewhere you don't want to be, this is referred to as a hijack.
3. Finally, a redirect may also refer to when a commands output is sent to an alternate output. For example, in an MS-DOS or Windows command line you could type the following command to redirect the output of the dir command to the example.txt file.
dir > example.txt