a furnace using sunlight concentrated by concave mirrors as the direct source of heat.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for solar furnace
a furnace utilizing the sun as a heat source, sunlight being concentrated at the focus of a system of concave mirrors
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