| adjective | incapable of being perceived by the senses especially the sense of touch; - James Jeans “the intangible constituent of energy” |
| adjective | imperceptible to the senses or the mind “an impalpable cloud” |
| adjective | not perceptible to the touch “an impalpable pulse” |
| intangibility | noun | the quality of being intangible and not perceptible by touch |
| intangibleness | noun | the quality of being intangible and not perceptible by touch |
| impalpability | noun | the quality of being intangible and not perceptible by touch |