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.
Report Abuse. The horn on a ship can be called either the whistle or the horn. It is used to alert anyone not on the ship itself, usually other vessels. The other sound signaling device on a ship is the bell which is used to alert the crew and passengers who are on the ship.