Tidal wave

Tidal wave may refer to:

• A tidal bore, which is a large movement of water formed by the funnelling of the incoming tide into a river or narrow bay
• A storm surge, or tidal surge, which can cause waves that breach flood defences
• A tsunami, a series of water waves in a body of water caused by the displacement of a large volume water, although this usage of "tidal wave" is not favored by the scientific community because tsunamis are not tidal in nature
• A megatsunami, which is an informal term to describe a tsunami that has initial wave heights that are much larger than normal tsunamis
• The crest (physics) of a tide as it moves around the Earth