| 1. | Geology. 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. |
| 5. | basic; fundamental. |
bedrock
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