Definition of rectify

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< rectifier

rectilinear >

rec·ti·fy    (rkt-f) KEY 

TRANSITIVE VERB:
rec·ti·fied, rec·ti·fy·ing, rec·ti·fies

1. To set right; correct.
2. To correct by calculation or adjustment. See Synonyms at correct.
3. Chemistry To refine or purify, especially by distillation.
4. Electronics To convert (alternating current) into direct current.
5. To adjust (the proof of alcoholic beverages) by adding water or other liquids.

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ETYMOLOGY:
Middle English rectifien, from Old French rectifier, from Medieval Latin rctificre : Latin rctus, right; see reg- in Indo-European roots + Latin -ficre, -fy

OTHER FORMS:
recti·fia·ble(Adjective), recti·fi·cation  (-f-kshn) KEY (Noun)