indenture

nouns

a concave cut into a surface or edge (as in a coastline)
formal agreement between the issuer of bonds and the bondholders as to terms of the debt
is a type of (narrower)
a legal document summarizing the agreement between parties
a contract binding one party into the service of another for a specified term
is derived from
is a type of (narrower)
a binding agreement between two or more persons that is enforceable by law
the space left between the margin and the start of an indented line

verbs

bind by or as if by indentures, as of an apprentice or servant
"an indentured servant"