To purchase back; to ransom; to rescue; to free by making atonement; to make good; to deliver from the bondage of sin and its penalties; to be more diligent in improving.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (verb) (v.) (verb)
To deliver from captivity, or from any liability to suffer, by paying a price; to ransom; to recover; to repurchase; to save or improve, as time; to make good by performance; to regain a thing alienated by repaying the price of it to the possessor; to perform the work of redemption.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (verb) (v.) (verb)
To buy back; ransom; rescue; fulfil, as a promise.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (verb) (v. t.) (verb transitive)
To ransom: to relieve from captivity by a price: to rescue: to pay the penalty of: to atone for: to perform, as a promise: to improve: to recover, as a pledge.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (verb) (v. t.) (verb transitive)
- Newage Dictionary DB (adjective) (adj.) (adjective)
To buy back; to free from bondage or slavery by paying a ransom or price; rescue; free from sin and its consequences; make good; as, to redeem a promise; make up for; as, to redeem a fault; to pay what is due on, as a promissory note; to recover, as property given for security to a bank, etc.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (verb) (v. t.) (verb transitive)

Usage examples:

More than this, I want to redeem myself.
- The Red Acorn by John McElroy
It was worth five or six thousand francs, and he required three thousand to redeem it.
- Honore de Balzac, His Life and Writings by Mary F. Sandars
Take heed, O generous champion, take heed, If thou thy name by worthy thought or deed, From Time's all- sweeping current couldst redeem Take heed, and lift thy heart to high desires!
- The Poems of Giacomo Leopardi by Giacomo Leopardi