idle

Short definition from Wiktionary

Adjective

1. 1
   Empty, vacant.
2. 2
   Not being used appropriately; not occupied; (of time) with no, no important, or not much activity.
3. 3
   Not engaged in any occupation or employment; unemployed; inactive; doing nothing in particular.
4. 4
   Averse to work, labor or employment; lazy; slothful.
5. 5
   Of no importance; useless; worthless; vain; trifling; thoughtless; silly.
6. 6
   Light-headed; foolish.

Verb

1. 1
   To spend in idleness; to waste; to consume.
2. 2
   To lose or spend time doing nothing, or without being employed in business.
3. 3
   Of an engine: to run at a slow speed, or out of gear; to tick over.
4. 4
   To cause (an engine) to idle(3)

Noun

1. 1
   The state of idling, of being idle.
2. 2
   The lowest selectable thrust or power setting of an engine.
3. 3
   An idle animation.
4. 4
   An idle game.

Proper noun

1. 1
   Initialism of Integrated DeveLopment Environment.
2. 2
   Initialism of Integrated Development and Learning Environment.
3. 3
   Acronym of indolent lesion of epithelial origin.
4. 4
   A surname.
5. 5
   A suburb in the City of Bradford, West Yorkshire, England (OS grid ref SE1737).
6. 6
   A river, the River Idle in Nottinghamshire, England, which flows into the River Trent.