›FINANCEa written agreement that states the rights and responsibilities of a company that sells a bond and someone who buys it: The securities were issued under an indenture, dated as of June 1, 2009. an indenture trustee.
›especially in the past, a formal agreement that someone will work for someone else for a particular length of time, especially in order to learn a job: On the completion of his indenture, he continued to attend night school. The apprenticeship indentures were signed by the guild master and the apprentice's guardian.