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adjective

tectonic

/tekˈtɑnɪk/  ·  say it: tek·TAH·nik

relating to the movement of the earth's crustal plates

In Science & Nature

In more detail

1. (adjective) relating to the structure of the Earth's crust and the large plates that make up it

2. (adjective) of great importance and causing major changes

Examples

How to use tectonic

In geological contexts, tectonic refers specifically to Earth's crustal plates and their interactions. In figurative use, it describes profound structural changes or pivotal moments in any domain (politics, culture, business), often with the implication of inevitable, large-scale transformation. The figurative sense has become common in journalism and academic writing.

Register: formal

Common phrases

Synonyms

structural · architectural · foundational · seismic · plate-related

Opposites

minor · insignificant · superficial

Word family

tectonics (noun) · tectonically (adverb)

A common mistake

Learners sometimes use 'tectonic' loosely to mean simply 'big' or 'important' without implying fundamental structural change; the word carries stronger connotations of underlying, systemic shift rather than mere scale.

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