Definition from Wiktionary, the free dictionary
Alternative forms 
indenture (plural indentures)
- (law) A contract which binds a person to work for another, under specified conditions, for a specified time (often as an apprentice).
- (law) A document, written as duplicates separated by indentations, specifying such a contract.
- An indentation.
- To bind a person under such a contract.
Derived terms 
bind under such a contract
- “indenture” in Douglas Harper, Online Etymology Dictionary (2001).