Meaning of “bedrock” in the English Dictionary

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"bedrock" in American English

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bedrocknoun [ U ]

us /ˈbedˌrɑk/

earth science the hard, solid area of rock in the ground that supports the earth above it

Bedrock also means the principles and ideas on which something is based:

We feel that the family is the bedrock of society.

(Definition of “bedrock” from the Cambridge Academic Content Dictionary © Cambridge University Press)