EX SILENTIO Meaning of EX SILENTIO in English [ ˌɛks sɪ'lɛnʃɪəʊ ]■ adjective & adverb (of an argument or theory) based on lack of contrary evidence.OriginL., 'from silence'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004