Definition: The word "URL_auto.conf" refers to a configuration file in the Apache web server, typically located on a server's home directory or within a virtual hosting service like CloudFlare. This conf file is used by the Apache HTTP Server to set up routing and security configurations for web applications running on the server. The definition of "URL_auto.conf" can be summarized as being a configuration file that defines application URL auto-redirect behavior in Apache, usually using the 'httpd' or 'upstart' daemon. It's often used by systems with multiple servers sharing the same host address to configure automatic redirections between different web applications.