Meaning

• To heal (an organ or part of the body).

• To restore (someone or something) to its proper condition; to straighten out, to set right.

• To remedy or fix (an undesirable state of affairs, situation etc.).

  "to rectify the crisis"

• To purify or refine (a substance) by distillation.

• To correct or amend (a mistake, defect etc.).

• To correct (someone who is mistaken).

• (geodesy) To adjust (a globe or sundial) to prepare for the solution of a proposed problem.

• To convert (alternating current) into direct current.

• To determine the length of a curve included between two limits.

• To produce (as factitious gin or brandy) by redistilling bad wines or strong spirits (whisky, rum, etc.) with flavourings.