Pronunciation: (wôk'thrOO"),[key] —n. 1. Theat.,Television. a. a rehearsal in which physical action is combined with reading the lines of a play.
b. a perfunctory performance of a script.
2. Television,Motion Pictures.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.
—adj. 1. designed to be walked through by an observer: The zoo has a walk-through aviary where the birds are all around you. 2. activated by a person passing through: a walk-through electronic scanner at the airport for detecting concealed weapons.