idle

adjective (idler, idlest)

• 1(especially of a machine or factory) not active or in use:assembly lines standing idle for lack of spare parts
• (of a person) not working; unemployed.
• (of a person) avoiding work; lazy.
• [attributive] (of time) characterized by inaction or absence of significant activity:at no time in the day must there be an idle moment
• (of money) held in cash or in accounts paying no interest.

• 2without purpose or effect; pointless:he did not want to waste valuable time in idle chatter
• (especially of a threat or boast) without foundation:I knew Ellen did not make idle threats

verb

• (of a person) spend time doing nothing; be idle:four men were idling outside the shop
• move aimlessly or lazily:Cal idled past MetroHealth at a stately pace
• (of an engine) run slowly while disconnected from a load or out of gear:the car is noisily idling in the street
• [with object] cause (an engine) to idle.
• [with object] take out of use or employment:he will close the newspaper, idling 2,200 workers