abstract, aerial, airy, amorphous, asomatous, bodiless, difficult to appraise, dim, discarnate, disembodied, ethereal, immaterial, impalpable, imperceptible, imponderable, inappreciable, inconspicuous, incorporal, incorporate, incorporeal, indefinite, indiscernible, infinitesimal, insensible, insubstantial, intactile, intactilis, invisible, nonphysical, nonsubstantial, not clear to the mind, not definite, shadowy, spiritual, theoretical, unapparent, unbeholdable, uncertain, unconcrete, undiscernible, unearthly, unfleshly, unperceivable, unphysical, unseeable, unsolid, unsubstantial, untouchable, vague, weightless, without form, without physical substance
associated concepts: intangible assets, intangible personalty, intangible property
assignable rights of action, chose in action, incorporeal entity, intactilis, personal chattels which are not in possession, personal right not reduced to possession, right, right to personal things, right to recovery
associated concepts: intangible assets, intangible personalty, intangible property, intangible trust property
elusive, immaterial, impalpable, imponderable, inappreciable, incorporeal, nonsubstantial (not sturdy), vague
Burton's Legal Thesaurus. William C. Burton. 2006
adj.Having no physical presence; difficult to define or grasp. See also tangible
The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. Amy Hackney Blackwell. 2008.
n. Impalpable; not capable of being touched or otherwise detected by the senses.
Webster's New World Law Dictionary. Susan Ellis Wild. 2000.