2 to change an electrical current from AC to DC --
4 to deal with a problem or mistake so that it no longer exists: --
How do we rectify the alarming fall in stock market performance?
rectify a problem/situation/mistake The CEO and upper management pledged to take the necessary steps to rectify the situation.
be rectified Marketing strategies appear to have been weak and this must be rectified to facilitate growth.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.