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English definition of “bedrock”

bedrock

noun (ROCK)    /ˈbed.rɒk/ US  /-rɑːk/
[U] the hard area of rock in the ground that holds up the loose soil aboveTypes of rockPrecious and semi-precious stones
(Definition of bedrock noun (ROCK) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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