Definition: The word "800craft.jar" refers to a specific software installation tool used by Minecraft Forge in its Java-based Minecraft engine. It's commonly found on a download page for the game, allowing players to install various plugins or add new content. The "800" part is a reference to the number of lines in the file that controls the Minecraft version, 800Craft. The "craft.jar" part is the name of the jar file used by Minecraft Forge which contains Java libraries and classes needed for certain functionality like texture loading and physics. The word 'conf' could potentially mean configuration or options, as it suggests the installation tool might have some settings related to various aspects of Minecraft's operations.