<p><strong>Noun</strong></p><ul><li>A drink of whiskey mixed with club soda or ginger ale and served with ice in a tall glass.</li><li>In railroads, a signal to start a train, given with the hand or a lamp.</li><li>A signal for a train to move at full speed.</li><li>In military slang, a hand salute.</li></ul><p><strong>Verb</strong></p><ul><li>(Used without object) Slang: to move at full speed.</li><li>(Used with object) To signal to (the engineer of a train) to proceed.</li></ul>