The plain or ordinary meaning of the word "idle" is not working, being inactive, or unemployed. It can also refer to something that is not functioning properly because it is not being used or activated.
Usage examples
The machinery remained idle throughout the weekend.
Please do not leave the computer idle for too long.
The workers were asked to stop being idle and resume their tasks.
I stared out of the window, lost in idle thoughts.
The children were bored and had nothing to do, so they engaged in idle chatter.
The car engine tends to stall when left idle for extended periods.
The company's resources were left idle due to poor management.
The students were reprimanded for their idle behavior during class.
The company saw a decrease in productivity due to the employees' idle conversations.