CASTRATER Meaning of CASTRATER in English nounor cas·tra·tor ˈ ̷ ̷ˌ ̷ ̷d.ə(r), -tə(r), ̷ ̷ˈ ̷ ̷ ̷ ̷( -s ) : one that castrates Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012