castrated cast·ra·ted UK/kæsˈtɹeɪtɪd/ US/ˈkæstɹeɪtɪd/ uncommon adjective 1. deprived of sexual capacity or sexual attributes Synonymsunsexed Antonymsuncastrated Similaralteredcutspayed WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.