<p><strong>Noun</strong></p><ul><li>A child's toy consisting of a wheel or leaflike curls of paper or plastic loosely attached by a pin to a stick, designed to revolve when blown by or as by the wind.</li><li>Also called catherine wheel.</li><li>A kind of firework supported on a pin which, when ignited, revolves rapidly and gives a dazzling display of light.</li><li>A wheel having pins at right angles to its rim for engaging the teeth of a gear.</li></ul><p><strong>Verb</strong></p><ul><li>(Used without object) to revolve rapidly like a pinwheel: Images of the past pinwheeled through his mind.</li></ul>