What does the word brink mean?

Usage examples for brink

  1. He was on the brink of an abyss. – Quicksands by Adolph Streckfuss
  2. Lady Ongar, however, soon carried him away from the actual brink of the precipice. – The Claverings by Anthony Trollope
  3. But have they not been indulged until the state is on the brink of ruin, and they appear stubborn in error? – Essays on the Constitution of the United States by Paul Leicester Ford
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