walk through (Noun) — A thorough explanation (usually accompanied by a demonstration) of each step in a procedure or process. ex. "she gave me a walk-through of my new duties"
walk through (Noun) — A pedestrian passageway through the ground floor of a building.
walk through (Noun) — A first perfunctory rehearsal of a theatrical production in which actors read their lines from the script and move as directed.
walk through (Noun) — The act of walking in order to view something. ex. "the estate agent took her on a walk-through of the apartment"
walk through (Noun) — (computing) a review process where colleagues check a program's design to ensure it meets all requirements and is correct.
walk through (Verb) — Perform in a perfunctory way, as for a first rehearsal.