All 7 Uses of

redeem

in

Measure for Measure

Which had you rather,—that the most just law Now took your brother's life; or, to redeem him, Give up your body to such sweet uncleanness As she that he hath stain'd?†
Scene 2.4

Ignominy in ransom and free pardon Are of two houses; lawful mercy Is nothing kin to foul redemption.†
Scene 2.4

I have begun, And now I give my sensual race the rein: Fit thy consent to my sharp appetite; Lay by all nicety and prolixious blushes That banish what they sue for: redeem thy brother By yielding up thy body to my will; Or else he must not only die the death, But thy unkindness shall his death draw out To lingering sufferance: answer me to-morrow, Or, by the affection that now guides me most, I'll prove a tyrant to him.†
Scene 2.4

I do make myself believe that you may most uprighteously do a poor wronged lady a merited benefit; redeem your brother from the angry law; do no stain to your own gracious person; and much please the absent duke, if peradventure he shall ever return to have hearing of this business.†
Scene 3.1

Here is in our prison a common executioner, who in his office lacks a helper; if you will take it on you to assist him, it shall redeem you from your gyves; if not, you shall have your full time of imprisonment, and your deliverance with an unpitied whipping; for you have been a notorious bawd.†
Scene 4.2

O worthy duke, You bid me seek redemption of the devil: Hear me yourself; for that which I must speak Must either punish me, not being believ'd, Or wring redress from you; hear me, O, hear me here!†
Scene 5.1

Definitions:

(1) (redeem as in: its main redeeming quality is...)
to make up for something bad; or to save
(2) (redeem as in: redeem the coupon)
exchange, convert, or pay off
The exact meaning of redeem can depend upon its context. For example:
- "to redeem a coupon" -- exchange something for something else of value
- "to redeem stock" -- sell or convert to cash
- "to redeem a mortgage" -- pay off a loan
(3) (meaning too rare to warrant focus)
In Christianity, redemption is used to reference Jesus' sacrifice to make up for human sin.

Old usage (as might be found in the Bible or in Shakespeare) also uses redeeming time to refer to making the best use of time.