Lewis & Short

rĕdemptĭo, ōnis, f. [redimo].

  1. I. A buying back, buying off; a releasing, ransoming, redemption: cum captivis redemptio negabatur, Liv. 25, 6: ducis (capti), Quint. 7, 1, 29: puellae, Val. Max. 4, 3, 1: sacramenti, i. e. the purchase of one’s military oath, i. e. of his discharge, Auct. B. Alex. 56, 4 (cf. id. ib. 55, 4: qui se pecuniā redemerunt).
    Absol.: quia mercede pactā accesserat ad talem redemptionem, i. e. a releasing or release of the debtor from the demand, by paying the creditor, Dig. 17, 1, 6 fin.; v. redemptor.
  2. II. A buying up of a court of justice, bribing: judicii, Cic. Verr. 1, 6, 16.
    Plur. and absol.: reorum pactiones, redemptiones, Cic. Pis. 36, 87.
  3. III. A farming of the revenue, Cic. Prov. Cons. 5, 11.
  4. IV. Esp. (eccl. Lat.), a release from sin or from its penalties, a rescuing from death, etc.: animae suae, Vulg. Psa. 48, 8; absol., id. Eph. 1, 7.