1.Definition: (of especially business assets) not having physical substance or intrinsic productive value
"Intangible assets such as good will"
2.Definition: hard to pin down or identify
"An intangible feeling of impending disaster"
3.Definition: incapable of being perceived by the senses especially the sense of touch
"The intangible constituent of energy"
4.Definition: lacking substance or reality; incapable of being touched or seen
"That intangible thing--the soul"