Redemption: A Definition by Jonathan Edwards
The definition of Redemption has both a micro and a macro definition. Here Jonathan Edwards is particularly helpful in explaining both from his work, A History of the Work of Redemption:
The use of the word redemption.—And here it may be observed, that the work of redemption is sometimes understood in a more limited sense, for the purchase of salvation; for the word strictly signifies, a purchase of deliverance. If we take the word in this restrained sense, the work of redemption was not so long in doing; but was begun and finished with Christ’s humiliation. It was begun with Christ’s incarnation, carried on through his life, and finished with the time of his remaining under the power of death, which ended in his resurrection. And so we say, that on the day of his resurrection Christ finished the work of redemption, i. e. then the purchase was finished, and the work itself, and all that appertained to it, was virtually done and finished, but not actually.
But sometimes the work of redemption is taken more largely, as including all that God accomplishes tending to this end; not only the purchase itself, but also all God’s works that were properly preparatory to the purchase, and accomplishing the success of it. So that the whole dispensation, as it includes the preparation and purchase, the application and success of Christ’s redemption, is here called the work of redemption. All that Christ does in this great affair as Mediator, in any of his offices, either of prophet, priest, or king; either when he was in this world, in his human nature, or before, or since. And it includes not only what Christ the Mediator has done, but also what the Father, or the Holy Ghost, have done, as united or confederated in this design of redeeming sinful men; or, in one word, all that is wrought in execution of the external covenant of redemption. This is what I call the work of redemption in the doctrine; for it is all but one work, one design. The various dispensations or works that belong to it, are but the several parts of one scheme. It is but one design that is formed, to which all the offices of Christ directly tend, and in which all the persons of the Trinity conspire. All the various dispensations that belong to it are united; and the several wheels are one machine, to answer one end, and produce one effect.