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1. An opening between two rooms, especially a shelved space between a kitchen and dining room that is used for passing food.
2. A route through which something is permitted to pass.
3. A financial security collateralized by a portfolio of mortgages or other loans, the income from which is passed through an intermediary before being distributed to investors in fixed payments. Also called pass-through security.
4. The policy, practice, or act of paying for an increased cost by raising the price charged to one's customers or clients. Also called pass-along.

pass′-through′ adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


US a hatch, esp one for passing food from the kitchen to the dining room
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


or pass′through`,

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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pass-through - 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)
opening - a vacant or unobstructed space that is man-made; "they left a small opening for the cat at the bottom of the door"
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