noun. The solid rock that underlies loose material, such as soil, sand, clay, or gravel.

noun. undefined

noun. The very basis; the foundation.

noun. The lowest point.

noun. 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.

noun. Hence That which underlies anything else, as a foundation; bottom layer; lowest stratum.

The solid rock underlying superficial formations. Also Fig.

noun. 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.

noun. A basis or foundation.

noun. solid unweathered rock lying beneath surface deposits of soil

noun. principles from which other truths can be derived

"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."

rock  stone  

10-1/2  CCC  Pyrex  backfill  bell glass  

aa  abyssal rock  basalt  base  basement