Concise Bible Dictionary:
This word occurs often in the New Testament. It stands in contrast to what is earthly (Rom. 15:27); and to what is carnal, or of the flesh (1 Cor. 3:1). In short it may be said to be that which is of the Holy Spirit, in contrast to what is of the natural man.
Strong’s Dictionary of Greek Words:
Transliteration:
pneumatikos
Meaning:
from 4151; non-carnal, i.e. (humanly) ethereal (as opposed to gross), or (daemoniacally) a spirit (concretely), or (divinely) supernatural, regenerate, religious