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English definition of “tectonic”

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tectonic

adjective uk   /tekˈtɒn.ɪk/ us    /-ˈtɑː.nɪk/ specialized
relating to the structure of the surface of the Earth and the way it is formed, changed, and moved by forces inside it: the motion of Earth's tectonic plates (= sections of the planet's surface)
tectonics
noun [U] uk   /-ˈtɒn.ɪks/ us    /-ˈtɑː.nɪks/
plate tectonics
(Definition of tectonic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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