TUMULUS Meaning of TUMULUS in English [ 'tju:mjʊləs ]■ noun ( plural tumuli -lʌɪ , -li: ) an ancient burial mound; a barrow.OriginME: from L.; related to tumere 'to swell'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004