1.adjectiveIn agreement with the principles of logic.
2.adjectiveReasonable.
3.adjectiveOf or pertaining to logic.
4.adjectiveNon-physical or conceptual yet underpinned by something physical or actual.
"Logical memory appears contiguous to an application program, but may well be stored on several physical devices, including in RAM and on hard-disks, as determined by the operating system."