1. An intimation, threat, or sign of impending danger or evil.

2. A narrow inlet of the sea between cliffs or steep slopes.

3. The point on the Earth's surface directly above the focus of an earthquake.

4. An overflowing of water onto land that is normally dry.

5. A very large ocean wave caused by an underwater earthquake or volcanic eruption.

6. A sudden movement of the earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity.

7. The top of a wave.

8. A large wave or billow.

9. The lowest point between waves.

10. A fracture in the continuity of a rock formation caused by a shifting or dislodging of the earth's crust, in which adjacent surfaces are displaced relative to one another and parallel to the plane of fracture.

11. An occurrence causing widespread destruction and distress; a catastrophe.