<p><strong>Adjective</strong></p><ul><li>not visible; not perceptible by the eye: invisible fluid.</li><li>withdrawn from or out of sight; hidden: an invisible seam.</li><li>not perceptible or discernible by the mind: invisible differences.</li><li>not ordinarily found in financial statements or reflected in statistics or a listing: Goodwill is an invisible asset to a business.</li><li>concealed from public knowledge.</li></ul><p><strong>Noun</strong></p><ul><li>an invisible thing or being.</li><li>the invisible, the unseen or spiritual world.</li></ul>