EPI- Meaning of EPI- in English (also ep- before a vowel or h ) ■ prefix1》 upon: epigraph.2》 above: epicotyl.3》 in addition: epiphenomenon. Originfrom Gk epi 'upon, near to, in addition'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004