prehistoric or prehistorical [pree-hi-stawr-ik, -stor-, pree-i-] (previously 01-21-13)
1. of or relating 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 outdated; passé: My mom has these prehistoric ideas about proper dress.
See more synonyms on Thesaurus.com
Origin: 1850-55; pre- + historic
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