INTRO- Meaning of INTRO- in English [intro-] prefix [ME, fr. MF, fr. L, fr. intro inside, to the inside, fr. (assumed) OL interus, adj., inward] 1: in: into "introjection" 2: inward: within "introvert"--compare extro- Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012