Rectify Rec"ti*fy (-f?), v. t. [imp. & p. p. Rectified (-f?d); p. pr. & vb. n. Rectifying (-f?`?ng).] [F. rectifier, LL. rectificare; L. rectus right + -ficare (in comp.) to make. See Right, and -fy.] 1. To make or set right; to correct from a wrong, erroneous, or false state; to amend; as, to rectify errors, mistakes, or abuses; to rectify the will, the judgment, opinions; to rectify disorders. I meant to rectify my conscience. --Shak. This was an error of opinion which a conflicting opinion would have rectified. --Burke. 2. (Chem.) To refine or purify by repeated distillation or sublimation, by which the fine parts of a substance are separated from the grosser; as, to rectify spirit of wine. 3. (Com.) To produce ( as factitious gin or brandy) by redistilling low wines or ardent spirits (whisky, rum, etc.), flavoring substances, etc., being added.