- glazing consisting of two thicknesses of glass with a dead air space between them.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- two panes of glass in a window, fitted to reduce the transmission of heat, sound, etc
- the fitting of glass in such a manner
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