Definition of seaquake noun from the Oxford Advanced Learner's Dictionary

 

seaquake

 noun
noun
BrE BrE//ˈsiːkweɪk//
 
; NAmE NAmE//ˈsiːkweɪk//
 
Natural disasters
 
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a sudden powerful movement of the sea, caused by an earthquake or by volcanic activity under the sea See related entries: Natural disasters
See the Oxford Advanced American Dictionary entry: seaquake