seismic
1 ENTRIES FOUND:
Britannica Dictionary definition of SEISMIC
always used before a noun
1
technical
:
of, relating to, or caused by an earthquake
-
seismic activity/data/waves/zones
2
[more seismic; most seismic]
:
very great or important
-
Seismic social changes have occurred.
-
The discovery caused a seismic shift [=a great change] in public attitudes.
-
a seismically active region [=a region where many earthquakes occur]
