Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The solid rock that exists at some depth below the ground surface. Bedrock is rock "in place", as opposed to material that has been transported from another location by weathering and erosion.
  • n. A basis or foundation.

from the GNU version of the Collaborative International Dictionary of English

  • The solid rock underlying superficial formations. Also Fig.

from The Century Dictionary and Cyclopedia

  • n. In mining, the older crystalline and slaty rocks which underlie the unconsolidated gravelly and volcanic beds of Tertiary and Post-tertiary ages, along the flanks of the Sierra Nevada.
  • n. Hence That which underlies anything else, as a foundation; bottom layer; lowest stratum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. solid unweathered rock lying beneath surface deposits of soil
  • n. principles from which other truths can be derived

Etymologies

bed +‎ rock (Wiktionary)

Examples

  • Because of the recent financial meltdown and the newly straitened circumstances of many Americans, certain bedrock virtues — thrift, faith, community, hard work — are enjoying a renaissance, according to John Gerzema and Michael D 'Antonio in Spend Shift.

    Business

  • This is what would have to happen to bring down either tower, since the inner cores — the dense grid of 47 massive steel columns anchored in bedrock — were the primary vertical support for the towers.

    1000 Architects and Engineers

  • The bedrock is an ancient, heavily eroded Cambrian metamorphic plateau dramatically punctuated by a chain of isolated flat-topped mountains.

    Aïr and Ténéré Natural Reserves, Niger

  • To erode that bedrock is to subscribe, to a “divine right of kings” theory of governance, in which those who govern are absolved from adhering to the basic moral standards to which the governed are accountable.

    Bush Slanders Freedom « Antiwar.com Blog

  • To erode that bedrock is to risk even further injustice.

    Bush Slanders Freedom « Antiwar.com Blog

  • First, as the article points out, to achieve their goal they'd have to change the laws of physics since the Holland Tunnel is buried in bedrock and the worst that could happen to the tunnel itself would be a cascade of rocks and mud.

    July 2006

  • I believe that the United States of America was founded on certain bedrock principles - that all men are created equal and are endowed with inalienable rights.

    Sound Politics: Goldy Confesses...

  • We have reached a certain bedrock of intransigence in

    Professing Literature: John Guillory's Misreading of Paul de Man

  • But The Masters, steeped in convention that seemed immovable as bedrock, is changing.

    USATODAY.com - Traditions die hard at Augusta National

  • Heavy buildings, especially multistory structures that are not anchored in bedrock, can tip over or sink into soil after it liquefies.

    Living on the Fault Line

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Comments

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  • This word will forever put me in mind of the Flintstones. ;-)

    February 20, 2007