seismic

[sahyz-mik, sahys-] / ˈsaɪz mɪk, ˈsaɪs- /

ADJECTIVE

pertaining to an earthquake or event within the earth's crust

Synonyms

STRONGEST

basaltic tectonic

STRONG

quaky quivering tremorous tremulous vibrational

WEAK

earthshattering groundbreaking profound tumultuous

Antonyms

STRONGEST

ethereal insubstantial subtle vaporous

STRONG

constant fixed motionless placid solid unchanging

WEAK

frivolous inconsequential insignificant superficial trivial

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Goodspeed travels back to the 18th century to downturns in the U.S. and the United Kingdom to explain why the common narrative that one seismic shock will flip an economy on its head is wrong.

From Barron's • Apr. 3, 2026

The 1933 Long Beach earthquake, magnitude 6.4, killed more than a hundred people, but it also made seismic safety a requirement throughout the state.

From Los Angeles Times • Mar. 26, 2026

Protests had been shelved in recognition of the magnitude of the game, one which would have seismic repercussions on Spurs' season.

From BBC • Mar. 22, 2026

The reason the craziest sport in the country suddenly turned dull is the seismic forces reshaping college athletics: NIL and the transfer portal.

From The Wall Street Journal • Mar. 17, 2026

The roads between the reactor and the seismic isolated building were choked with debris from the explosions.

From "Meltdown" by Deirdre Langeland