verb (used with object), rectified, rectifying.
to make, put, or set right; remedy; correct: He sent them a check to rectify his account.
to put right by adjustment or calculation, as an instrument or a course at sea.
Chemistry. to purify (especially a spirit or liquor) by repeated distillation.
Electricity. to change (an alternating current) into a direct current.
to determine the length of (a curve).
Astronomy, Geography. to adjust (a globe) for the solution of any proposed problem.

1350–1400; Middle English rectifien < Middle French rectifier < Medieval Latin rēctificāre, equivalent to Latin rēct(us) right + -ificāre -ify

nonrectified, adjective
self-rectifying, adjective
unrectified, adjective

1. mend, emend, amend. 2. adjust, regulate, straighten.

1. worsen, muddle. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
rectify (ˈrɛktɪˌfaɪ)
vb , -fies, -fying, -fied
1.  to put right; correct; remedy
2.  to separate (a substance) from a mixture or refine (a substance) by fractional distillation
3.  to convert (alternating current) into direct current
4.  maths to determine the length of (a curve)
5.  to cause (an object) to assume a linear motion or characteristic
[C14: via Old French from Medieval Latin rectificāre to adjust, from Latin rectus straight + facere to make]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1400, from O.Fr. rectifier, lit. "to make straight" (14c.), from L.L. rectificare "make right" (3c.), from L. rectus "straight" (see right) + root of facere "to make" (see factitious).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

rectify rec·ti·fy (rěk'tə-fī')
v. rec·ti·fied, rec·ti·fy·ing, rec·ti·fies

  1. To set right; correct.

  2. To refine or purify, especially by distillation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
He is capable of rectifying his mistakes, by discussion and experience.
Even though housing is in a bubble in the major cities, the government is working on rectifying it.
When their students came in the morning for the rectifying of the alternators.
Jake eventually emerges as the only one capable of rectifying the family's problems, and those problems build to a violent ending.
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