tidal wave, term properly applied to the crest of a tide as it moves around the earth. The wavelike upstream rush of water caused by the incoming tide in some locations is known as a tidal bore. In popular usage the term tidal wave also is often applied to any destructive wave or to high water not related to tidal phenomena. These latter waves are of two types: tsunamis, which are waves caused by earthquakes, and storm surges (see under storm).
tid·al wave • n. an exceptionally large ocean wave, esp. one caused by an underwater earthquake or volcanic eruption (used as a nontechnical term for tsunami). ∎ fig. a widespread or overwhelming manifestation of an emotion or phenomenon: a tidal wave of crime.
Tidal Wave ★½ Nippon Chiubotsu; The Submersion of Japan; Japan Sinks 1975 (PG)
Scientists discover that Japan is slowly sinking and order the island to be evacuated. Originally a popular Japanese production, the American version is a poorly dubbed, reedited mess. 82m/C VHS . JP Lorne Greene, Keiju Kobayashi, Rhonda Leigh Hopkins, Hiroshi Fujioka, Shiro Moriana; D: Andrew Meyer.