Source : Webster's Revised Unabridged Dictionary (1913)

Crag \Crag\ (kr[a^]g), n. [W. craig; akin to Gael. creag, Corn.
   karak, Armor. karrek.]
   1. A steep, rugged rock; a rough, broken cliff, or point of a
      rock, on a ledge.

            From crag to crag the signal flew.    --Sir W.
                                                  Scott.

   2. (Geol.) A partially compacted bed of gravel mixed with
      shells, of the Tertiary age.

Crag \Crag\, n. [A form of craw: cf. D. kraag neck, collar, G.
   kragen. See {Craw}.]
   1. The neck or throat [Obs.]

            And bear the crag so stiff and so state. --Spenser.

   2. The neck piece or scrag of mutton. --Johnson.

Source : WordNet®

crag
     n : a steep rugged rock or cliff