pass through (Noun) — An opening that resembles a window between two rooms (especially a shelved opening between a kitchen and dining room that is used to pass dishes).
pass through (Verb) — Make a passage or journey from one place to another. ex. "Some travellers pass through the desert"
pass through (Verb) — Cause to move through.
pass through (Verb) — Pass through an enemy line; in a military conflict.