<p><strong>Noun</strong></p><ul><li>(in the British army) a member of the first regiment of household infantry Grenadier Guards</li><li>(formerly) a specially selected foot soldier in certain elite units</li><li>(formerly) a soldier who threw grenades</li><li>also called rattail</li><li>any of several deep-sea fishes of the family Macrouridae, having an elongated, tapering tail</li></ul>