Idle generally refers to idleness, a lack of motion or energy. Idle or idling, may also refer to: Technology. Idle (engine), engine running without load. Idle speed. Idle (CPU), CPU non-utilisation or low-priority mode. Synchronous Idle (SYN), the idle command to synchronize terminals. System Idle Process. Idle (programming language), a dialect of Lua. IDLE, an integrated development environment for the Python programming language. IMAP IDLE, an IMAP feature where an email server actively notifies a client application when new mail has arrived. Places.
https://en.wikipedia.org/wiki/Idle