<p><strong>Noun</strong></p><ul><li>plural grampus</li><li>a cetacean, <em>Grampus griseus</em>, of the dolphin family, widely distributed in northern seas.</li><li>any of various related cetaceans, as the killer whale, <em>Orcinus</em> (<em>Orca</em>) orca.</li><li>a giant whip scorpion common to Florida.</li></ul>