to put (something) right; to remedy or correct (a mistake)
to correct (a situation) by removing errors
to convert (alternating current) to direct current
to purify (e.g. alcohol), esp by repeated or fractional distillation
to determine the length of (an arc or curve)
rectifiable adj
rectification /-fiʹkaysh(ə)n/ noun
[Middle English rectifien via French from medieval Latin rectificare, from Latin rectus right]