A stay is like a legal "hold" placed for a purpose. If the party that is "held" objects to the "hold" placed on it by a court, that party can petition the court for relief from the stay. They can ask, can make a motion, that the stay be lifted. That's the motion of relief from the stay. If the court then reviews the motion and decides not to "change its mind" regarding the reason it issued the stay, the court will dismiss the motion for relief from the stay. The stay will remain in place.