Codicillus Law and Legal Definition

Codicillus is a Latin term, meaning ‘little document.’ In Roman law, ‘codicillus’ means an informal document instructing an heir to carry out a particular performance. Usually, codicil requires the payment of money or transfer of property to a third person. During August’s reign, directives contained in codicilli became legally binding.

Codicillus could also mean an imperially granted appointment or special privilege.