What is the meaning of Amendment?

An alteration or change for the better; correction of a fault or of faults; reformation of life by quitting vices.

In public bodies, any alteration made or proposed to be made in a bill or motion that adds, changes, substitutes, or omits.

Correction of an error in a writ or process.

An addition to and/or alteration to the Constitution.

That which is added; that which is used to increase or supplement something.

Source: wiktionary.org