sterilized ste·ri·li·zed US/ˈstɛrʌˌlaɪzd/ uncommon adjective 1. made free from live bacteria or other microorganisms “sterilized instruments” Synonymsantisepticsterilised Similargermfree 2. made infertile Synonymssterilised Similarsterile WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.