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1. Determine the length of
   "rectify a curve"
    
2. Reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities
   - refine
    
3. Bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one
   - reform, reclaim, regenerate
    
4. Set straight or right
   "rectify the inequities in salaries";
   - remediate, remedy, repair, amend
    
5. Make right or correct
   "rectify the calculation";
   - correct, right
    
6. Convert into direct current
   "rectify alternating current"

Derived forms: rectifies, rectifying, rectified

Type of: alter, ascertain, change, change by reversal, commute, convert, determine, distil [Brit], distill [N. Amer], exchange, find, find out, make pure, modify, purify, reverse, sublimate, turn

Encyclopedia: Rectify