walk-through (n.)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
walk-through (n.)a pedestrian passageway through the ground floor of a building;
walk-through (n.)a first perfunctory rehearsal of a theatrical production in which actors read their lines from the script and move as directed;
walk-through (n.)the act of walking in order to view something;
the realtor took her on a walk-through of the apartment
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