Noun walk-through has 4 senses

• walk-through(n = noun.communication) Array - 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"
is a kind of account, explanation

• walk-through(n = noun.artifact) Array - a pedestrian passageway through the ground floor of a building; Array
is a kind of passageway

• walk-through(n = noun.act) Array - a first perfunctory rehearsal of a theatrical production in which actors read their lines from the script and move as directed; Array
is a kind of dry run, rehearsal
Derived form verb walk through₁

• walk-through(n = noun.act) Array - the act of walking in order to view something; "the realtor took her on a walk-through of the apartment"
is a kind of walk