Definition of firm proof:
"The fireproof safe will protect documents inside for up to four hours in a standard house fire."
°To make resistant to damage from fire.
"I hastily fireproofed my clothing somewhat by pouring a bucket of water over myself before dashing into the flames."
Definition of firm proof:
"The fireproof safe will protect documents inside for up to four hours in a standard house fire."
°To make resistant to damage from fire.
"I hastily fireproofed my clothing somewhat by pouring a bucket of water over myself before dashing into the flames."