seismic /ˈsaɪzmɪk/adjective 3phrases 1 adjective3 •Related to, or caused by an earthquake or other vibration of the Earth. •Subject to earthquakes. •(figurative) Of very large or widespread effect.With Spurs having avoided a seismic Cup upset, Newport's heroic display will be rewarded with a lucrative replay at Wembley. — 2018 Phrases with seismic seismic shiftA fundamental reorientation of a state of affairs.
