English edit

Etymology edit

rim +‎ rock

Noun edit

rimrock (plural rimrocks)

  1. (geology) An outcrop of hard rock, often in the form of a cliff at the edge of a plateau, that forms the margin of a gravel deposit

Verb edit

rimrock (third-person singular simple present rimrocks, present participle rimrocking, simple past and past participle rimrocked)

  1. (transitive) To drive (animals) over a cliff edge.