<p><strong>Adjective</strong></p><ul><li>of or relating to air, gases, or wind.</li><li>of or relating to pneumatics.</li><li>operated by air or by the pressure or exhaustion of air: a pneumatic drill.</li><li>filled with or containing compressed air, as a tire.</li><li>equipped with pneumatic tires.</li><li>Theology: of or relating to the spirit; spiritual.</li><li>Zoology: containing air or air cavities.</li></ul><p><strong>Noun</strong></p><ul><li>a pneumatic tire.</li><li>a vehicle having wheels with such tires.</li></ul>