Not having physical form; insubstantial(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "nonphysical" in a sentence
"Instead, there were entries for each time they had met, copies of the e-mails they’d exchanged about the life cycles of parasites, about the logic of host-parasite interactions, about the idea of nonphysical intelligence."
"He is neither a male nor a female, a person nor a nonperson, physical nor nonphysical, old nor young... the list goes on."
"The spirit world was presumed to be nonphysical because it could not be readily perceived by our conventional physical senses of seeing, hearing, tasting, smelling, and touching."