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Adjective: prehistoric  ,pree-(h)i'stor-ik [N. Amer], ,pree-(h)i'stó-rik [Brit]
  1. Belonging to or existing in times before recorded history
    "prehistoric peoples";
    - prehistorical
  2. Outdated
    "my mother has these prehistoric ideas about proper clothes"
  3. Of or relating to times before written history
    "prehistoric archeology"

See also: daggy [Austral, NZ, informal], past, unfashionable, unstylish

Encyclopedia: Prehistoric