1. A state of idling. Used of a motor vehicle: an engine running quietly at idle.
2. A mechanism for regulating the speed at which an engine runs at rest: set the idle higher to keep the motor from stalling.

Idle (engine) - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Idle_(engine)
Idling refers to running a vehicle's engine when the vehicle is not in motion. This commonly occurs when drivers are stopped at a red light, waiting while parked ...

Idle speed - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Idle_speed
Idle speed (idling, or idle) is the rotational speed the engine runs on when the engine is uncoupled to the drivetrain and the throttle pedal isn't depressed ...

Does starting a car consume more petrol or keeping it on standby for ...
https://www.quora.com/Does-starting-a-car-consume-more-petro...
Engines that use a MAP sensor are typically fuel injected. The manifold ... I'm not really sure what keeping a car on standby is (idling?), but the amount of fuel ...

Standby battery charging techniques can ensure engine startups ...
www.backwoodshome.com/standby-battery-charging-techniques-c...
Before going into more detail on how you can keep all of your idle equipment ... current to offset the normal charge loss for a battery in a standby or idle state.

Keyboard mode for "Standby" or "Idle" - The Corsair User Forums
forum.corsair.com › ... › Corsair Utility Engine (CUE)
Keyboard mode for "Standby" or "Idle" Corsair Utility Engine (CUE)

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Note added at 1 day15 hrs (2016-08-13 11:43:42 GMT)
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http://www.letonika.lv/groups/default.aspx?g=2&q=brīvība&r=1...
brīvgaita (tik sg. tech.) tuščioji eiga this is the idle/idling
brīvgājiens (tech.) laisvoji eiga this is the standby

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Note added at 1 day15 hrs (2016-08-13 11:48:01 GMT)
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Tuščioji eiga (be apkrovimo)
Transformatoriaus tuščiąja eiga vadinama tokia jo veika, kai prie pirminės apvijos yra prijungtas kintamosios įtampos šaltinis, o antrinė apvija išjungta (srovės joje nėra). Transformatorius dirbdamas tuščiąja eiga nedaug sunaudoja energijos, nes srovė I0, kuri įmagnetina plieninę šerdį, dėl ritės induktyvumo yra labai maža. Tuščiosios eigos atveju energija neperduodama iš pirminės grandinės į antrinę.
Transformatoriaus tuščiosios eigos veika yra patogi transformacijos koeficientui ir apvijų vijų skaičiui
nustatyti. Tuo tikslu reikia voltmetru išmatuoti įtampas U1 ir U2 pirminėje ir antrinėje apvijose.

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Note added at 1 day15 hrs (2016-08-13 11:48:33 GMT)
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http://asu.lt/wp-content/uploads/2015/01/6_transformatoriaus...

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Note added at 1 day15 hrs (2016-08-13 11:50:33 GMT)
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Sakyčiau, kad laisvoji I cannot explain you the whole difference as I am not atechnical expert but you see (based on my links) that there is a difference between two terms so if you provide more context we can go ahead...

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Note added at 1 day15 hrs (2016-08-13 11:58:14 GMT)
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STIGA VILLA
manuals.ggp-group.com/8211-0011-10_Villa.pdf
Üresjárat. 2.4.6 Gyújtáskapcsoló/fényszóró (2, 4.F). A gyújtáskapcsoló szolgál a motor indítására és ...... mašina juda atbuline eiga. 4. ..... panaikinta laisvoji eiga.
[PDF]XM 130, XM 140 HD, XM 160 HD

manuals.ggp-group.com/8211-0081-01_Castelgarden_XM_B&S.pdf
Üresjárat. 3.4.6 Gyújtáskapcsoló/fényszóró (7:U). A gyújtáskapcsoló szolgál a motor indítására és ...... 30 sek. padirbti tuščiąja eiga. 6. ... panaikinta laisvoji eiga.

It took some times until I find for you a multilingual reference (I saw that the question was about the engine but why you do not give context?)

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Note added at 1 day15 hrs (2016-08-13 11:58:54 GMT)
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http://manuals.ggp-group.com/8211-0011-10_Villa.pdf


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Note added at 1 day15 hrs (2016-08-13 12:00:22 GMT)
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üresjárat / standby in this case has no other meaning, but there is a difference between freewheeling and idle

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Note added at 1 day15 hrs (2016-08-13 12:01:33 GMT)
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please give context to determine otherwise your question cannot be answered fully.