What does the word welter mean?

Usage examples for welter

  1. I said that he was a welter weight. – The Green Flag by Arthur Conan Doyle
  2. For the Lord's sake, cried Blaise, staring into the welter below, give me something in my bare hand. – The Justice of the King by Hamilton Drummond
  3. But he, as I learned afterwards, was leaving nothing behind him, except a welter of debts and threats of legal proceedings. – The Mirror of the Sea by Joseph Conrad