Aquinas' definition. The Oxford Concise Dictionary of the Christian Church defines acedia (or accidie) as a state of restlessness and inability either to work or to pray. Some see it as the precursor to slothâone of the seven deadly sins.
A train horn is a powerful air horn that serves as an audible warning device on electric and Diesel locomotives. The horn's primary purpose is to alert persons and animals to an oncoming train, especially when approaching a grade crossing. The horn is also used for acknowledging signals given by railroad employees, such as during switching operations.
Learn More About Train Horns. You are riding in your car when you pass a big rig. You catch the driverâs eye and pump your arm in the universal symbol pleading, âPlease blow your horn.â The driver complies, and the blast thrills you. Even joggers on main roads pump their arms, hoping to hear that spine-tingling train horn blast.