seismic

Definition of Seismic in English :

1. seismal, seismic

subject to or caused by an earthquake or earth vibration

WordNet Lexical Database for English. Princeton University. 2010.

Seismic

adjective

1.

relating to or caused by earthquakes or artificially produced earth tremors

. Also (less commonly): seismical (ˈsaɪzmɪkəl )

2.

of enormous proportions or having highly significant consequences

seismic social change

adjective

1.

of, having to do with, or caused by an earthquake or earthquakes or by man-made earth tremors

2.

subject to earthquakes

adj.

1. Of, subject to, or caused by an earthquake or earth vibration.

2. Earthshaking: an issue of seismic proportions and ramifications.