<p><strong>Noun</strong></p><ul><li>An Old World, insect-eating mammal of the genus <em>Erinaceus</em>, especially <em>E. europaeus</em>, having spiny hairs on the back and sides.</li><li>The porcupine.</li><li>A portable obstacle made of crossed logs in the shape of an hourglass, usually laced with barbed wire.</li><li>An obstructive device consisting of steel bars, angle irons, etc., usually embedded in concrete, designed to damage and impede the boats and tanks of a landing force on a beach.</li></ul>