<p><strong>Noun</strong></p><ul><li>A hooked prolongation that develops during the spawning season on the lower jaw of a male salmon or trout.</li><li>Machinery: a thin, wedgelike strip of metal for controlling the area in which a moving part, as the table of a milling machine, slides.</li><li>A keylike part having a head at each end, used with a matching cotter as a fastening.</li><li>(In carpentry or ironwork) a heavy metal strap for fastening two members together.</li></ul><p><strong>Verb</strong></p><ul><li>(Used with object) to fasten (parts) together by means of a gib.</li></ul>