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

 

earthquake

 noun
noun
BrE BrE//ˈɜːθkweɪk//
 
; NAmE NAmE//ˈɜːrθkweɪk//
 
(informal quake) Natural disasters
 
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a sudden, violent shaking of the earth’s surface damage caused by a powerful earthquake The earthquake measured 68 on the Richter scale. Wordfinderavalanche, cyclone, disaster, earthquake, eruption, flood, hurricane, landslide, tornado, tsunami See related entries: Natural disastersExtra examples It was the biggest earthquake ever recorded in the US. The area has not experienced a major earthquake in more than 700 years. The block of flats was destroyed in an earthquake. The earthquake hit the city at two in the morning. The earthquake shook buildings throughout the business district. The school was built to withstand earthquakes. You can’t accurately predict earthquakes. an earthquake measuring 5.8 on the Richter scale an organization which monitors earthquake activity the evacuation of coastlines within 600 miles of the earthquake’s epicentre/​epicenter the tsunami caused by an undersea earthquake
See the Oxford Advanced American Dictionary entry: earthquake