What is the meaning of modification?

noun

• The act of making something different (as e. G. The size of a garment.
  • synonyms: alteration, adjustment
• Slightly modified copy; not an exact copy.
  • usage: "a modification of last year's model"
• The grammatical relation that exists when a word qualifies the meaning of the phrase.
  • synonyms: qualifying, limiting
• An event that occurs when something passes from one state or phase to another.
  • usage: "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"
  • synonyms: change, alteration