[tsoo-nah-mee] 
| an unusually large sea wave produced by a seaquake or undersea volcanic eruption. |
[tsoo-nah-mik, -nam-ik] , adjective | tsu·na·mi (tsŏŏ-nä'mē) n. pl. tsu·na·mis A very large ocean wave caused by an underwater earthquake or volcanic eruption. [Japanese : tsu, port + nami, wave.] tsu·na'mic (-mĭk) adj. |
A large wave on the ocean, usually caused by an undersea earthquake, a volcanic eruption, or coastal landslide. A tsunami can travel hundreds of miles over the open sea and cause extensive damage when it encounters land. Also called tidal waves.
