The Collaborative International Dictionary of English v.0.48:

Indenture \In*den"ture\, v. i.
   To run or wind in and out; to be cut or notched; to indent.
   --Heywood.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Indenture \In*den"ture\ (?; 135), n. [OE. endenture, OF.
   endenture, LL. indentura a deed in duplicate, with indented
   edges. See the Note below. See Indent.]
   [1913 Webster]
   1. The act of indenting, or state of being indented.
      [1913 Webster]

   2. (Law) A mutual agreement in writing between two or more
      parties, whereof each party has usually a counterpart or
      duplicate, sometimes with the edges indented for purpose
      of identification; sometimes in the pl., a short form for
      indentures of apprenticeship, the contract by which a
      youth is bound apprentice to a master.
      [1913 Webster]

            The law is the best expositor of the gospel; they
            are like a pair of indentures: they answer in every
            part.                                 --C. Leslie.
      [1913 Webster]

   Note: Indentures were originally duplicates, laid together
         and indented by a notched cut or line, or else written
         on the same piece of parchment and separated by a
         notched line so that the two papers or parchments
         corresponded to each other. But indenting has gradually
         become a mere form, and is often neglected, while the
         writings or counterparts retain the name of indentures.
         [1913 Webster]

   3. Hence: A contract by which anyone is bound to service.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Indenture \In*den"ture\, v. t. [imp. & p. p. Indentured; p.
   pr. & vb. n. Indenturing.]
   [1913 Webster]
   1. To indent; to make hollows, notches, or wrinkles in; to
      furrow.
      [1913 Webster]

            Though age may creep on, and indenture the brow.
                                                  --Woty.
      [1913 Webster]

   2. To bind by indentures or written contract; as, to
      indenture an apprentice.
      [1913 Webster]

WordNet (r) 3.0 (2006):

indenture
    n 1: a concave cut into a surface or edge (as in a coastline)
         [syn: indentation, indenture]
    2: formal agreement between the issuer of bonds and the
       bondholders as to terms of the debt
    3: a contract binding one party into the service of another for
       a specified term
    4: the space left between the margin and the start of an
       indented line [syn: indentation, indention, indent,
       indenture]
    v 1: bind by or as if by indentures, as of an apprentice or
         servant; "an indentured servant" [syn: indenture,
         indent]