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storm window

noun
1.
a supplementary window sash for protecting a window against drafts, driving rain, etc.
Also called storm sash.
Origin
1885-1890
1885-90
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for storm-window

storm window

noun
1.
an additional window fitted to the outside of an ordinary window to provide insulation against wind, cold, rain, etc
2.
a type of dormer window
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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7
8
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