<p><strong>Noun</strong></p><ul><li>a state trooper</li><li>a mounted police officer; a police officer on horseback</li><li>a soldier in a cavalry that uses horses</li><li>a persevering, dependable person who works hard or who bravely endures adversity: He's a real trooper, even when the going gets tough</li><li>a cavalry horse</li><li>Chiefly British: a troopship</li></ul>