Definition of bedrock
(Entry 1 of 2)
1
: the solid rock underlying unconsolidated surface materials (such as soil)
2a
: lowest point
b
: basis
bedrock
adjectiveDefinition of bedrock (Entry 2 of 2)
: solidly fundamental, basic, or reliable
traditional bedrock values a bedrock constituency
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Merriam-Webster unabridged
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Time Traveler for bedrock
The first known use of bedrock was in 1839
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