( tidal waves)
1.
A tidal wave is a very large wave, often caused by an earthquake, that flows onto the land and destroys things.
...a massive tidal wave swept the ship up and away.
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2.
If you describe a very large number of emotions, things, or people as a tidal wave , you mean that they all occur at the same time.
The trade union movement was swept along by the same tidal wave of patriotism which affected the country as a whole...
= deluge
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