Rectify

1. verb

   reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities

   “refine sugar”

   Similar: refine

2. verb

   bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one

   “The Church reformed me”

   Similar: reform, reclaim, regenerate

3. verb

   math: determine the length of

   “rectify a curve”

4. verb

   convert into direct current

   “rectify alternating current”