ˈ ̷ ̷| ̷ ̷ adjective
Etymology: smoke (I) + proof, adjective
: impermeable to smoke ; specifically : designed to restrict the spread of smoke through a building — used especially of a door or partition
ˈ ̷ ̷| ̷ ̷ adjective
Etymology: smoke (I) + proof, adjective
: impermeable to smoke ; specifically : designed to restrict the spread of smoke through a building — used especially of a door or partition
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012