Source : WordNet®

walk-through
     n 1: a thorough explanation (usually accompanied by a
          demonstration) of each step in a procedure or process;
          "she gave me a walk-through of my new duties"
     2: a pedestrian passageway through the ground floor of a
        building
     3: a first perfunctory rehearsal of a theatrical production in
        which actors read their lines from the script and move as
        directed
     4: the act of walking in order to view something; "the realtor
        took her on a walk-through of the apartment"