Definition of beaker for Students. : a cup or glass with a wide mouth and usually a lip for pouring that is used especially in science laboratories for holding and measuring liquids.
In Microsoft Windows, each environment variable's default value is stored in the Windows registry or set in the AUTOEXEC.BAT file. On Unix, a setuid program is given an environment chosen by its caller, but it runs with different authority from its caller.
Common folder variables. A variable folder is a folder that might refer to different places on different PCs. Malware will often use a variable folder when it tries to access, change, or create files and folders on your PC. The opposite of a variable folder is a hardcoded folder, which is always in the same place on every PC.