stone age
US /ˈstoʊn ˌeɪdʒ/
UK /ˈstoʊn ˌeɪdʒ/
1.
a prehistoric period when weapons and tools were made of stone or of materials such as bone, wood, or horn
:
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Humans lived in caves during the Stone Age.
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Archaeologists found artifacts from the Stone Age.
2.
a very primitive or outdated period or way of life
:
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Their technology is still in the Stone Age.
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Living without internet feels like the Stone Age.