bedrock

The definition of bedrock means the layer of solid rock below the soil.

(noun)

Unbroken solid rock found at the bottom during an archaeological dig is an example of bedrock.

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See bedrock in Webster's New World College Dictionary

noun

  1. solid rock beneath the soil and superficial rock
  2. a secure foundation
  3. the very bottom
  4. basic principles or facts

See bedrock in American Heritage Dictionary 4

noun
  1. The solid rock that underlies loose material, such as soil, sand, clay, or gravel.
  2. a. The very basis; the foundation: Ownership of land is the bedrock of democracy.
    b. The lowest point: personal finances that were at bedrock.

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