sleeper

[ether]

What the exact meaning of this word in English? I mean, has it something to do with a spy or similar?

 

[mourningstar]

What the exact meaning of this word in English? I mean, has it something to do with a spy or similar?

yeah, i think you can use the word "sleeper" to refer to a spy who isn't active at the moment in order to make people think they're a common person.
why? any addings to the overall meaning?

 

[Rusty]

That's pretty much it.

From www.dictionary.com:

"A spy or saboteur who is planted in an enemy country and who lives unobtrusively as a citizen of that country until activated into clandestine operations by a prearranged signal."

 

[HarmonyDies....]

someone who is sleeping.

 

[yourdeadgroom]

Sleepers are also things that are used in the construction of railway tracks

 

[Demonspell]

It's also slang for someone or something that escapes one's attention, much like the drums on the chorus...

 

[EvilVince]

Sleepers are the crust in your eyes when you wake up in the morning.

 

[Omerta]

That's just "sleep"

 

[ben4g]

It's also slang for someone or something that escapes one's attention, much like the drums on the chorus...

Mohuahuahua. Sure; I still haven´t been able to hear Jonas´ voice on the chorus, man.