Webster's Revised Unabridged Dictionary · 1913

Indenture

Indenture (?; 135) , noun

[Old English endenture, Old French endenture, Late Latin indentura a deed in duplicate, with indented edges. See the Note below. See Indent.]

1.
The act of indenting, or state of being indented.
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.
The law is the best expositor of the gospel; they are like a pair of indentures: they answer in every part. — C. Leslie

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.

3.
A contract by which anyone is bound to service.

Indenture , transitive verb

1.
To indent; to make hollows, notches, or wrinkles in; to furrow.
Though age may creep on, and indenture the brow. — Woty
2.
To bind by indentures or written contract; as, to indenture an apprentice.

Indenture , intransitive verb

To run or wind in and out; to be cut or notched; to indent. — Heywood