Pronunciation: (pas'thrOO", päs'-), [key]
1. a windowlike opening, as one for passing food or dishes between a kitchen and a dining area.
2. a place through which one passes or is obliged to pass: Motorists used the park as a pass-through. The new gate will be a pass-through for security clearance.
denoting a pass-through; passalong. Also,pass'through".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.