what are tsunamis definition
A tsunami (plural: tsunamis or tsunami; from Japanese: æ´¥æ³¢, lit. harbor wave; English pronunciation: /tsuËËnÉËmi/) , also known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake.he term tsunami, meaning harbor wave in literal translation, comes from the Japanese æ´¥æ³¢, composed of the two kanji æ´¥ (tsu) meaning  harbor  and æ³¢ (nami), meaning  wave . (For the plural, one can either follow ordinary English practice and add an s, or use an invariable plural as in the Japanese.