| Noun | 1. | codicil - a supplement to a will; a testamentary instrument intended to alter an already executed will appendix - supplementary material that is collected and appended at the back of a book testament, will - a legal document declaring a person's wishes regarding the disposal of their property when they die law, jurisprudence - the collection of rules imposed by authority; "civilization presupposes respect for the law"; "the great problem for jurisprudence to allow freedom while enforcing order" |