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
Examples of seismic in a Sentence
Seismic social changes have occurred.
Recent Examples on the Web
Related Articles Indeed, the platform’s effect on content creation was seismic long before the emergence of TikTok Shop shook things up even further.
—
Noor Lobad, WWD, 14 Jan. 2025
Meteorological agency experts convened late Monday to evaluate whether the recent 6.6 magnitude earthquake might be connected to seismic activity in the Nankai Trough, a region known for periodic major quakes.
—John Mac Ghlionn, Newsweek, 14 Jan. 2025
The Japan Meteorological Agency said in a statement the quake happened with its epicenter in the Hyuga-Nada Sea around 9:19 p.m., local time, adding that seismic activity has continued since then.
—David Chiu, People.com, 13 Jan. 2025
Researchers presented the latest seismic and inflation results on the volcano last month at the American Geophysical Union conference in Washington, D.C.
The scientists’ prediction shouldn’t be taken as a sign to panic—the volcano doesn’t pose a threat to people.
—Elizabeth Gamillo, Smithsonian Magazine, 9 Jan. 2025
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Noor Lobad, WWD, 14 Jan. 2025
Meteorological agency experts convened late Monday to evaluate whether the recent 6.6 magnitude earthquake might be connected to seismic activity in the Nankai Trough, a region known for periodic major quakes.
—John Mac Ghlionn, Newsweek, 14 Jan. 2025
The Japan Meteorological Agency said in a statement the quake happened with its epicenter in the Hyuga-Nada Sea around 9:19 p.m., local time, adding that seismic activity has continued since then.
—David Chiu, People.com, 13 Jan. 2025
Researchers presented the latest seismic and inflation results on the volcano last month at the American Geophysical Union conference in Washington, D.C.
The scientists’ prediction shouldn’t be taken as a sign to panic—the volcano doesn’t pose a threat to people.
—Elizabeth Gamillo, Smithsonian Magazine, 9 Jan. 2025
See all Example Sentences for seismic
Dictionary Entries Near seismic
Cite this Entry
“Seismic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seismic. Accessed 17 Jan. 2025.
Copy CitationKids Definition
seismic
adjective
seis·mic
ˈsīz-mik 
ˈsīs-
: of, subject to, or caused by an earthquake or an earth vibration caused by something else (as an explosion)
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