excuss verb5 •To proceed against a principal debtor where there are either joint debtors or debtors and sureties.The surety claimed relief in terms of the beneficium excussionis, thus obliging the creditor to excuss against the principal debtor. •To seize and detain by law. •(no longer used) To shake off. •(no longer used) To examine (a document). •(no longer used) To decipher. formsexcussed · excussing · excusses