esoterica eso·te·rica UK/iːsəˈtɛɹɪkə/ US/ɛsɵˈtɛɹəkə/ uncommon noun 1. secrets known only to an initiated minority Related words Broader terms secret WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.