FILTRATE Meaning of FILTRATE in English [ 'fɪltreɪt ]■ noun a liquid which has passed through a filter. ■ verb rare filter.Derivativesfiltration noun OriginC17: from mod. L. filtrat- , filtrare 'filter'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004