pre ‧ his ‧ to ‧ ry /priːˈhɪst ə ri/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ historian , ↑ history , ↑ prehistory ; adjective : ↑ historic , ↑ prehistoric , ↑ historical ; adverb : ↑ historically ]
the time in history before anything was written down