seismic

adj

1. (not-comparable)Related to, or caused by an earthquake or other vibration of the Earth.

   “seismic activity”

2. (not-comparable)Subject to earthquakes.

   “a seismic area”

3. (figuratively, not-comparable)Of very large or widespread effect.

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

   “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.”

   “That the two leading candidates are women is seismic in a country imbued with machismo, where gender violence is rampant and the fight for women’s rights has been especially sluggish under the incumbent president, Andrés Manuel López Obrador, known as AMLO, who is limited by Mexico’s Constitution to one six-year term.”