CODICIL Meaning of CODICIL in English [cod.i.cil] n [MF codicille, fr. L codicillus, dim. of codic-, codex] (15c) 1: a legal instrument made to modify an earlier will 2: appendix, supplement -- cod.i.cil.la.ry adj Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012