What is the meaning of the word "summit"?

Definitions:

  1. a meeting of heads of governments copy to clipboard noun
    • They could not agree on a climate change policy at the last summit. copy to clipboard
  2. reach the summit (of a mountain) copy to clipboard verb
    • The experienced climbers summited in now time at all. copy to clipboard
  3. the top or extreme point of something, usually a mountain or hill copy to clipboard noun
    • I felt like I was going to die when I finally reached the summit. copy to clipboard

Synonyms: