Noun

1. rectification, refining, refinement, purification

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

2. rectification, conversion, transition, changeover

usage: the conversion of alternating current to direct current

3. correction, rectification, improvement

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

4. rectification, determination, finding

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

See also: rectification (Dictionary)