<p><strong>Noun</strong></p><ul><li>a collar or enclosing band.</li><li>the enclosing rim within which a jewel is set.</li><li>a slotted cylindrical clamp inserted tightly into the tapered interior of a sleeve or chuck on a lathe to hold a cylindrical piece of work.</li><li>Horology: the tiny collar that supports the inner terminal of a hairspring.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) colleted, collecting: to set (a gem or other stone) in a collet.</li></ul>