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Definition of DL. 1  DL is short for down-low, which basically means to keep things under-wraps, to keep a secret or lay low. 2  I'll tell you this, but, you gotta promise to keep it on the DL. D.L. means down low. it means that something is not known to all. if you keep something on the D.L... 2  you don't share it with others. 3  I don't want my Dad to find out, so keep it on the D.L. 4  She like me but keep that on the DL.
Potential Dangerous Information-RUNDLL32.exe is a microsoft program used to 'launch' DLL's as a process. SPYWARE and other related software use this in combination with services to infect your machine and to keep there software running.his program is part of Windows, used to run program code in DLL files as if it were an actual program. However, many viruses also use this name or similar names such as 'rundII32' (uppercase i appears the same as lowercase L in many fonts). It's also commonly used by spyware to launch its own code.