Webster's Revised Unabridged Dictionary · 1913

Injunction

Injunction , noun

[Latin injunctio, from injungere, injunctum, to join into, to enjoin. See Enjoin.]

1.
The act of enjoining; the act of directing, commanding, or prohibiting.
2.
That which is enjoined; an order; a mandate; a decree; a command; a precept; a direction.
For still they knew, and ought to have still remembered, The high injunction, not to taste that fruit. — Milton
Necessary as the injunctions of lawful authority. — South
3.
(Law) A writ or process, granted by a court of equity, and, in some cases, under statutes, by a court of law, whereby a party is required to do or to refrain from doing certain acts, according to the exigency of the writ.

It is more generally used as a preventive than as a restorative process, although by no means confined to the former.