[f. CLEAVE v.1 + -ING2.] That cleaves or splits.
1621. G. Sandys, Ovids Met., VI. (1626), 109. The cleauing rock, from whence a fountayn brake.
1725. Pope, Odyss., V. 189. He cut the cleaving sky.
1819. Shelley, Let. Peacock, 25 Feb. Sky-cleaving mountains.