Entry 1 sense Webster, 1913 Pyrotechnics /pīrˌ-ōt-ĕk'-nĭks/ · Pyr·o·tech·nics · IPA /ˌpaɪ.roʊˈtɛk.nɪks/ 01 n. The art of making fireworks; the manufacture and use of fireworks; pyrotechny. 1. The art of making fireworks; the manufacture and use of fireworks; pyrotechny.