- The definition of prehistoric is the time before time was recorded.
An example of prehistoric is the Paleozoic era.
- prehistorically adverb
Used by arrangement with John Wiley & Sons, Inc.
- Of, relating to, or belonging to the era before recorded history.
- Of or relating to a language before it is first recorded in writing.
- preˌhis·torˈi·cal·ly adverb