All 3 Uses

rectify
in
Don Quixote
(Edited)

…some day I will expound the matter to some one able to see to and rectify it;
Chpt 1.21-22 *

rectify = correct, fix, or make right
…but a time may come when this omission can be remedied, and to rectify it nothing more is needed than for your worship to be so good as to come with me to my village, for there I can…
Chpt 1.23-24

rectify = correct
"To that I may reply," said Don Quixote, "that Dulcinea is the daughter of her own works, and that virtues rectify blood, and that lowly virtue is more to be regarded and esteemed than exalted vice."
Chpt 2.31-32

rectify = fix

Definitions:

(1) (rectify as in: rectify the error)
correct, fix, or make right
(2) (meaning too rare to warrant focus)
Specialized definitions of rectify include:
- chemistry: purify (e.g., via repeated distillation)
- manufacturing: separate from extraneous matter or cleanse from impurities
- electronics: convert alternate current into direct current