A more thorough explanation:

A redemptioner is a person who redeems something, particularly real property, under the equity of redemption or the right of redemption.

For example, if a homeowner falls behind on their mortgage payments and the bank forecloses on their property, the homeowner may still have the right to redeem the property by paying off the outstanding debt within a certain period of time. In this case, the homeowner would be considered a redemptioner.

Another example of a redemptioner is someone who purchases a property at a tax sale. In some states, the original owner of the property has a right of redemption, which allows them to buy back the property within a certain period of time by paying the amount owed plus interest and fees. If the original owner exercises this right, they would be considered a redemptioner.

Overall, a redemptioner is someone who has the legal right to redeem or reclaim something that has been lost or taken away, usually by paying a debt or fulfilling some other obligation.