walk-through

noun

1. Theater, Television.
   1. a rehearsal in which physical action is combined with reading the lines of a play.
   2. a perfunctory performance of a script.
2. Television, Movies. a rehearsal without cameras.
3. a step-by-step demonstration of a procedure or process or a step-by-step explanation of it as a novice attempts it.
4. a pedestrian passageway or arcade through the ground floor of a building connecting one street or building with another.