A wedding run-through is a REHEARSAL of the wedding ceremony and reception that takes place before the actual event. It is usually done a few days before the wedding to ensure that everything runs smoothly on the day. A REHEARSAL is an important part of the wedding planning process, as it allows the couple and their families to practice the order of events and make sure that everyone knows what they are supposed to do. The term for this is 'REHEARSAL, ' which has nine letters.