tectonic
adj.adj. relating to the huge pieces of rock that make up the Earth's surface. It can also describe a very large and important change in a situation.
adj. relating to the structure of the Earth's crust and the large-scale processes that take place within it. Often used metaphorically to describe shifts or changes of immense significance and scale.
The earthquake was caused by tectonic plates moving deep underground.
Scientists monitor tectonic activity along the fault line to predict potential natural disasters in the region.
The invention of the internet triggered a tectonic shift in how humanity communicates, permanently altering the landscape of global commerce and social interaction.
1650s, in sense of building, from Late Latin tectonicus, from Ancient Greek τεκτονικός (tektonikós, “pertaining to building”), from Ancient Greek τέκτων (téktōn, “carpenter, joiner, maker”), from Proto-Indo-European *teḱ- (“to make”) (from which also texture). In sense of geology, attested 1894. By surface analysis, Ancient Greek τέκτων (téktōn) + -ic (“pertaining to”).
Commonly modifies nouns like 'plate', 'shift', or 'activity'.