<p><strong>Adjective</strong></p><ul><li>transparently thin; diaphanous, as some fabrics: sheer silk.</li><li>unmixed with anything else: We drilled a hundred feet through sheer rock.</li><li>unqualified; utter: sheer nonsense.</li><li>extending down or up very steeply; almost completely vertical: a sheer descent of rock.</li><li>bright; shining.</li></ul><p><strong>Adverb</strong></p><ul><li>clear; completely; clean: ran sheer into the thick of battle.</li></ul><p><strong>Noun</strong></p><ul><li>a thin, diaphanous material, as chiffon or voile.</li></ul>