<p><strong>noun</strong></p><ul><li>an instrument for cutting, consisting essentially of a thin, sharp-edged, metal blade fitted with a handle.</li><li>a knifelike weapon; dagger or short sword.</li><li>any blade for cutting, as in a tool or machine.</li></ul><p><strong>verb</strong></p><ul><li>to apply a knife to; cut, stab, etc., with a knife.</li><li>to attempt to defeat or undermine in a secret or underhanded way.</li><li>(used without object) to move or cleave through something with or as if with a knife: The ship knifed through the heavy seas.</li></ul>