Pronunciation: (bed'rok"),[key] —n. 1. Geol.unbroken solid rock, overlaid in most places by soil or rock fragments.
2. bottom layer; lowest stratum.
3. any firm foundation or basis: Technical courses will be founded on a bedrock of sound, general education so as to produce a well-rounded engineer. 4. the fundamental principles, as of a teaching, belief, or science: Let's strip away the cant and get down to bedrock.