Definition of "walkthrough"

(software engineering) The process of inspecting algorithms and source code by following paths through the algorithms or code as determined by input conditions and choices made along the way.  examples

(video games) A thorough demonstration that explains the steps involved in winning the game.  examples

(accounting) A financial audit that traces a sample transaction through the system to ensure that it is processed and reported correctly.  examples

A theatrical or film rehearsal in which the actors move around the stage or set but are not in costume.  examples