Pronunciation: (prē"hi-stôr'ik, -stor'-, prē"i-), [key]
1. of or pertaining to the time or a period prior to recorded history: The dinosaur is a prehistoric beast.
2. Slang.outdated; passé: My mom has these prehistoric ideas about proper dress. Also,pre"his•tor'i•cal.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.