Definition of seismic
1 : of, subject to, or caused by an earthquake; also : of or relating to an earth vibration caused by something else (such as an explosion or the impact of a meteorite)
2 : of or relating to a vibration on a celestial body (such as the moon) comparable to a seismic event on earth
3 : having a strong or widespread impact : earthshaking seismic social changes
seismicallyplay \-mi-k(ə-)lē\ adverb
Examples of seismic in a Sentence
Seismic social changes have occurred.
Recent Examples of seismic from the Web
In 2015, Barack Obama had considered allowing the use of seismic airguns, but was met with staunch opposition from both scientists and local communities.
In addition to the wildfire threat, seismic experts and the news media increasingly have warned that a major Southern California earthquake is inevitable.
A same-sex relationship where they weren’t defined by who they were romantically involved with, but that just being a part of their identity — along with being able to summon torrential tidal waves and blast seismic attacks against bad guys.
From CNBC: The deal, announced with great fanfare before Trump took office, was billed not only as a heroic move to keep jobs from going to Mexico but also as a seismic shift in the economic development landscape.
During an earthquake, seismic waves radiate from the epicenter like waves on a pond.
So still nearly six weeks from the trade deadline that seems ever-present because of what could be seismic shifts ahead if the Royals are in sell mode, Moore has no reason to focus on that, even as others do it for him.
As the White House aides scrambling to calm the president surely understand, even Trump could not survive such a seismic and egocentric abuse of power.
The fiscal 2018 budget passed earlier this week included two capital improvement projects in the park — $200,000 for a West Mesa restroom and a California Building seismic retrofit — out of $24.7 million for all city parks.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'seismic'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of seismic
Greek seismos shock, earthquake, from seiein to shake; probably akin to Avestan thwaēshō fear
First Known Use: 1858See Words from the same year
SEISMIC Defined for English Language Learners
Definition of seismic for English Language Learners
: of, relating to, or caused by an earthquake
: very great or important
Seen and Heard
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