Definitions from Wiktionary (tidal wave)

▸ noun:  A large and sudden rise and fall in the tide.
▸ noun:  (proscribed) A large, sudden, and disastrous wave of water caused by a tremendous disturbance in the ocean; a tsunami. (See Usage notes below.)
▸ noun:  (proscribed) A large, sudden inundation of water from the storm surge, or waves of that surge; a sudden surge of river water.
▸ noun:  (figuratively) A sudden and powerful surge.
▸ noun:  (archaic) A crest of ocean water; a wave.
▸ noun:  (oceanography) A crest of ocean water resulting from tidal forces.
▸ Also see tidal_wave


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