Emily Dickinson Lexicon

CRAG, n. [W. Scot. and Ir. craig; Gaelic, creag; Corn. karak; Arm. garrecq; probably Gr. ῥαχια, ῥαχις, from the root of ῥηγνυω, to break, like rupes, in Latin, from the root of rumpo, rupi, and crepido, from crepo. See Crack. The name is taken from breaking, L. frango, for frago; and fragosus, and craggy, are the same word with different prefixes; Eng. ragged. The Κραγος in Cilicia, mentioned by Strabo and Pliny, retains the Celtic orthography.]

1. A steep rugged rock; a rough broken rock, or point of a rock.
2. In minerology, a tertiary deposit of gravel. – Mantell.