RETIARIUS Meaning of RETIARIUS in English [ ˌrɛtɪ'α:rɪəs , -'ɛ:rɪəs ]■ noun ( plural retiarii -rɪʌɪ , -rɪi: ) an ancient Roman gladiator who used a net to trap his opponent.OriginL., from rete 'net'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004