indenture

Short definition from Wiktionary

Noun

1. 1
   A contract which binds a person to work for another, under specified conditions, for a specified time (often as an apprentice).
2. 2
   A contract relating to lending (typically for issuing a bond), a real estate transaction, or a bankruptcy that imposes additional conditions on one or both parties.
3. 3
   A document, written as duplicates separated by indentations, specifying either of the above contracts.
4. 4
   An indentation; a recess.

Verb

1. 1
   To bind a person under such a contract.
2. 2
   To indent; to make hollows, notches, or wrinkles in; to furrow.