1.  bedrock(n = noun.object) - solid unweathered rock lying beneath surface deposits of soil;
is a kind of rock, stone

2.  bedrock(n = noun.cognition) basic principle, basics, fundamental principle, fundamentals - principles from which other truths can be derived; "first you must learn the fundamentals"; "let's get down to basics"
is a kind of principle
has particulars: abc, abc's, abcs, alphabet, first principle, first rudiment, rudiment

bedrock, n.
1 solid rock underlying alluvial deposits etc.
2 the underlying principles or facts of a theory, character, etc.

N  base, basement, plinth, dado, wainscot, baseboard, mopboard, bedrock, hardpan, foundation, substructure, substratum, ground, earth, pavement, floor, paving, flag, carped, ground floor, deck, footing, ground work, basis, hold, bilge, bottom, nadir, foot, sole, toe, hoof, keel, root, centerboard, bottom, undermost, nethermost, fundamental, founded on, based on, grounded on, built on.