| Main Entry: | tidal wave |
| Part of Speech: | noun |
| Definition: | giant sea wave |
Synonyms: |
eagre, giant sea swell, giant wave, rogue wave, seiche, seismic sea wave, surface wave, tidal bore, tsunami, white horses |
| Notes: | a tidal wave is caused by the gravitational effect of the moon and is on the surface (no deeper than 30 feet), while a tsunami is triggered by an earthquake, landslide, volcano, or meteorite and extends from the surface to the ocean floor |