1. (

• rectification

) (chemistry) the process of refinement or purification of a substance by distillation ;

2. (

• rectification

) the conversion of alternating current to direct current ;

3. (

• correction ,
• rectification

) the act of offering an improvement to replace a mistake; setting right ;

4. (

• rectification ,

) determination of the length of a curve; finding a straight line equal in length to a given curve ;