Open English Wordnet
Nouns
(n)tidal wavean overwhelming manifestation of some emotion or phenomenon“a tidal wave of nausea”, “the flood of letters hit him with the force of a tidal wave”, “a tidal wave of crime”
(n)tidal wavean unusual (and often destructive) rise of water along the seashore caused by a storm or a combination of wind and high tide
(n)tidal wavea wave resulting from the periodic flow of the tides that is caused by the gravitational attraction of the moon and sun