Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Of, subject to, or caused by an earthquake or earth vibration.
- adj. Earthshaking: an issue of seismic proportions and ramifications.
Century Dictionary and Cyclopedia
- Pertaining to or of the nature of an earthquake; relating to or connected with an earthquake, or with earthquakes in general. To a considerable extent, seismic takes the place of earthquake used as an adjective or in compound words. Thus seismic center is the equivalent of earthquake center, etc.
Wiktionary
- adj. Related to, or caused by an earthquake or other vibration of the Earth.
- adj. figuratively Of very large, or widespread effect.
GNU Webster's 1913
- adj. Of or pertaining to an earthquake; caused by an earthquake.
WordNet 3.0
- adj. subject to or caused by an earthquake or earth vibration
Etymologies
- Based on Ancient Greek σεισμός (seismos, "shaking, earthquake") + -ic. (Wiktionary)
Examples
“NEARY: Now, David Cameron said in that news conference yesterday that this coalition could mark what he called a seismic shift in British politics.”
“At about 5: 40 a.m. Eastern Time, the Mine Safety and Health Administration was informed of what they call a seismic event or ground failure near the site of the mine in question.”
“It far exceeds masonry walls in seismic resistence.”
“That move, and the Giants from New York to San Francisco, would usher in seismic changes for the game of baseball -- and not a few for America.”
The Huffington Post: George Mitrovich: When Brooklyn Was No More
“Every miniscule pothole was a lesson in seismic activity.”
“One of the Chinese companies would help with the so-called seismic work, sounding out deposits of oil and gas by monitoring vibrations sent into the ground.”
The Wall Street Journal: China Discusses Darfur Oil-Hunt Aid
“I want to underline what might be called a seismic imperative.”
“A cave-in was apparently triggered by what a mine spokesman calls a seismic bump or a mountain bump.”
“Six miners remain trapped, and a rescue crew was inside the mine searching for them when a so-called seismic bump happened.”
“Three rescuers were killed, six others hurt in a second collapse following something known as a seismic bump, some sort of activity that took place underground that caused coal to spill out and to fall.”
Lists
These user-created lists contain the word ‘seismic’.
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GRE Barrons Wordlist
A complete Barron's Wordlist for GRE preparation. Your online flashcard replacement.
abase, abash, abate, abbreviate, abdicate, aberrant, aberration, abet, abeyance, abhor, abject, abjure and 4087 more...
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GRE Barron's 800
abate, abdicate, aberrant, abeyance, abject, abjure, abscission, abscond, abstemious, abstinence, abysmal, accretion and 787 more...
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Hydrocarbon Energy Exploration/Extrac...
A list of terms encountered in the jargon of hydrocarbon exploration, mapping, and extraction.
hydrofracking, hydraulic fracturing, drilling, borehole, rig, formation, shale, coal, marl, seismic, horizontal drilling, unconventional ga... and 77 more...
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brian's biffs
melancholy, bucolic, visceral, cacophony, burlesque, exogenous, epiphany, monetization, accretive, opulent, splendid, seismic and 10 more...
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Just 'cause I like 'em, S
scrunch, solace, sabotage, saccade, sacerdotal, sacrilegious, sacristy, snappy, skew, steadfast, scowl, scorch and 781 more...
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eggplantia5's Words
scintillate, marvel, cranberry, oscillate, triumph, bamboozle, grimace, magical, book, hexagon, cipher, compendium and 2727 more...
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elvesoncrack's Words
lachrymose, blustering, fjord, chihuahua, chiffon, catalytic, stile, gefilte, prosh, thwart, ralph, ickle and 379 more...
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dyy's Words
ambivalence, irony, double-edged sword, paradox, struggle, plunge, buoy, pigeon-hole, ultimately, status quo, fuel, undermine and 230 more...
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stpeter's Words
abase, abasement, abashed, abdicate, aberrant, abeyance, abhor, abhorrent, abide, abject, ablation, abnegation and 3536 more...
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ifjuly's list
favorite words. some are made up injokes between me and my husband or family.
skein, zaftig, july, bed, orifice, aesthete, ink, parce-que, desormais, cake, pusillanimous, pulse and 531 more...
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Annsley's list
churlish, bibulous, salt, salty, conjugal, fabulist, maw, primordial, chimera, emetic, surly, excrescence and 228 more...
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ash
ash
abash, abate, abbreviate, abdicate, aberrant, aberration, abet, abeyance, abhor, abide, abject, abjure and 4874 more...
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List I
effortless, sloppy, undignified, sprawled, paradigm, asinine, reek, stench, impassive, devoid, meticulously, logical fallacy and 79 more...
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From anywhere
fodder, treacle, mutilate, afoul, peril, heed, overt, vault, commemorate, cathartic, seismic, demise and 12 more...
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Favorite actions . . .
quash, ravaging, leering, spelunk, fuck, gorge, behead, dismember, mingle, trespass, revenge, baffle and 35 more...
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squigee's Words
numismatist, oolite, cornichon, flit, penultimate, plutocracy, plumbic, oblate, seismic, penury, lapidary, aerie and 18 more...
Tweets
Looking for tweets for seismic.

madmouth 'heard', not 'read', I said (leave it to TV to fossilize terms into the incorrect domain).
though I suspect there's a bit of kooky femlit out there mentioning 'mother earth's seismic orgasm' Jun 5, 2009
yarb I still read it more often in relation to plate tectonics. Perhaps I'm reading the wrong matter. Jun 5, 2009
madmouth heard these days more often than not in the vicinity of orgasm Jun 5, 2009