seismic

Based on Ancient Greek σεισμός (seismós, “shaking, earthquake”) +‎ -ic.

• IPA^(key): /ˈsaɪzmɪk/

• Audio (UK)

  (file)

• Rhymes: -aɪzmɪk

seismic (comparative more seismic, superlative most seismic)

1. Related to, or caused by an earthquake or other vibration of the Earth.

   seismic activity

2. (figuratively) Of very large or widespread effect.
   • 2018 January 27, Dafydd Pritchard, “Newport 1 - 1 Tottenham Hotspur”, in BBC Sport‎:

     With Spurs having avoided a seismic Cup upset, Newport's heroic display will be rewarded with a lucrative replay at Wembley.

   • 2023 February 22, Sir Michael Holden, “Comment: A farewell to micro-management”, in RAIL, number 977, page 3:

     But the most seismic change is the shift to being supportive of open access. In practice, most of the industry has collectively opposed this for the past 25 years. The Department for Transport has been particularly hostile, seeing it as little more than cherry-picking.

3. (of a place) Subject to earthquakes

   a seismic area

From French séismique.

seismic m or n (feminine singular seismică, masculine plural seismici, feminine and neuter plural seismice)

1. seismic