Stone Age Definition
noun
A period in human culture during which stone implements are used; specif., the time of the Paleolithic, Mesolithic, and Neolithic periods of the Old World.
An outmoded business model right out of the Stone Age.
Webster's New World
An extremely backward or primitive era or state.
Back in the Stone Age of television broadcasting.
American Heritage
adjective
Belonging in the Stone Age.
Wiktionary
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