TECTONIC Meaning of TECTONIC in English tec ‧ ton ‧ ic /teəˈtɒnɪk, teɪˈtɒnɪk $ -ˈtɑːn-/ BrE AmE adjective [only before noun] technical relating to ↑ plate tectonics :tectonic movements Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012