- 1. geol.
- A long narrow crack or fracture especially in a body of rock, the Earth's surface or a volcano.
- Thesaurus: break, breach, chasm, rupture, split, crevice, fault, crack, cleft, fracture, gap.
- A natural narrow cleft or groove that divides an organ such as the brain into lobes.
- tr & intr
1. To crack, split or divide.