<p><strong>Noun</strong></p><ul><li>Also a protruding, ragged edge raised on the surface of metal during drilling, shearing, punching, or engraving.</li><li>a rough or irregular protuberance on any object, as on a tree.</li><li>a small, handheld, power-driven milling cutter, used by machinists and die makers for deepening, widening, or undercutting small recesses.</li><li>a lump of brick fused or warped in firing.</li></ul><p><strong>Verb</strong></p><ul><li>to form a rough point or edge on.</li><li>deburr.</li></ul>